diff --git a/dist/lodash.compat.js b/dist/lodash.compat.js
index 9635ce6fa..76f80374b 100644
--- a/dist/lodash.compat.js
+++ b/dist/lodash.compat.js
@@ -1784,18 +1784,20 @@
     }
 
     /**
-     * Creates a function that aggregates a collection, creating an object composed
-     * of keys generated from the results of running each element of the collection
+     * Creates a function that aggregates a collection, creating an object or
+     * array composed from the results of running each element of the collection
      * through a callback. The given `setter` function sets the keys and values
-     * of the composed object.
+     * of the composed object or array.
      *
      * @private
      * @param {Function} setter The setter function.
+     * @param {boolean} [retArray=false] A flag to indicate that the aggregator
+     *  function should return an array.
      * @returns {Function} Returns the new aggregator function.
      */
-    function createAggregator(setter) {
+    function createAggregator(setter, retArray) {
       return function(collection, callback, thisArg) {
-        var result = {};
+        var result = retArray ? [[], []] : {};
 
         callback = lodash.createCallback(callback, thisArg, 3);
         if (isArray(collection)) {
@@ -4082,6 +4084,54 @@
       return result;
     }
 
+    /**
+     * Creates an array of grouped elements, the first of which contains elements
+     * the callback returns truey for, the second of which contains elements the
+     * callback returns falsey for. The callback is bound to `thisArg` and invoked
+     * with three arguments; (value, index|key, collection).
+     *
+     * If a property name is provided for `callback` the created "_.pluck" style
+     * callback will return the property value of the given element.
+     *
+     * If an object is provided for `callback` the created "_.where" style callback
+     * will return `true` for elements that have the properties of the given object,
+     * else `false`.
+     *
+     * @static
+     * @memberOf _
+     * @category Collections
+     * @param {Array|Object|string} collection The collection to iterate over.
+     * @param {Function|Object|string} [callback=identity] The function called
+     *  per iteration. If a property name or object is provided it will be used
+     *  to create a "_.pluck" or "_.where" style callback, respectively.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {Array} Returns a new array of grouped elements.
+     * @example
+     *
+     * _.partition([1, 2, 3], function(num) { return num % 2; });
+     * // => [[1, 3], [2]]
+     *
+     * _.partition([1.2, 2.3, 3.4], function(num) { return this.floor(num) % 2; }, Math);
+     * // => [[1, 3], [2]]
+     *
+     * var characters = [
+     *   { 'name': 'barney',  'age': 36 },
+     *   { 'name': 'fred',    'age': 40, 'blocked': true },
+     *   { 'name': 'pebbles', 'age': 1 }
+     * ];
+     *
+     * // using "_.where" callback shorthand
+     * _.map(_.partition(characters, { 'age': 1 }), function(array) { return _.pluck(array, 'name'); });
+     * // => [['pebbles'], ['barney', 'fred']]
+     *
+     * // using "_.pluck" callback shorthand
+     * _.map(_.partition(characters, 'blocked'), function(array) { return _.pluck(array, 'name'); });
+     * // => [['fred'], ['barney', 'pebbles']]
+     */
+    var partition = createAggregator(function(result, value, key) {
+      result[key ? 0 : 1].push(value);
+    }, true);
+
     /**
      * Retrieves the value of a specified property from all elements in the collection.
      *
@@ -7435,6 +7485,7 @@
     lodash.pairs = pairs;
     lodash.partial = partial;
     lodash.partialRight = partialRight;
+    lodash.partition = partition;
     lodash.pick = pick;
     lodash.pluck = pluck;
     lodash.property = property;
diff --git a/dist/lodash.compat.min.js b/dist/lodash.compat.min.js
index 1a679ac1e..becaa3d24 100644
--- a/dist/lodash.compat.min.js
+++ b/dist/lodash.compat.min.js
@@ -9,58 +9,58 @@
  */
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diff --git a/dist/lodash.js b/dist/lodash.js
index 74dfeb62a..fb0b199d1 100644
--- a/dist/lodash.js
+++ b/dist/lodash.js
@@ -1556,18 +1556,20 @@
     }
 
     /**
-     * Creates a function that aggregates a collection, creating an object composed
-     * of keys generated from the results of running each element of the collection
+     * Creates a function that aggregates a collection, creating an object or
+     * array composed from the results of running each element of the collection
      * through a callback. The given `setter` function sets the keys and values
-     * of the composed object.
+     * of the composed object or array.
      *
      * @private
      * @param {Function} setter The setter function.
+     * @param {boolean} [retArray=false] A flag to indicate that the aggregator
+     *  function should return an array.
      * @returns {Function} Returns the new aggregator function.
      */
-    function createAggregator(setter) {
+    function createAggregator(setter, retArray) {
       return function(collection, callback, thisArg) {
-        var result = {};
+        var result = retArray ? [[], []] : {};
 
         callback = lodash.createCallback(callback, thisArg, 3);
         var index = -1,
@@ -3820,6 +3822,54 @@
       return result;
     }
 
+    /**
+     * Creates an array of grouped elements, the first of which contains elements
+     * the callback returns truey for, the second of which contains elements the
+     * callback returns falsey for. The callback is bound to `thisArg` and invoked
+     * with three arguments; (value, index|key, collection).
+     *
+     * If a property name is provided for `callback` the created "_.pluck" style
+     * callback will return the property value of the given element.
+     *
+     * If an object is provided for `callback` the created "_.where" style callback
+     * will return `true` for elements that have the properties of the given object,
+     * else `false`.
+     *
+     * @static
+     * @memberOf _
+     * @category Collections
+     * @param {Array|Object|string} collection The collection to iterate over.
+     * @param {Function|Object|string} [callback=identity] The function called
+     *  per iteration. If a property name or object is provided it will be used
+     *  to create a "_.pluck" or "_.where" style callback, respectively.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {Array} Returns a new array of grouped elements.
+     * @example
+     *
+     * _.partition([1, 2, 3], function(num) { return num % 2; });
+     * // => [[1, 3], [2]]
+     *
+     * _.partition([1.2, 2.3, 3.4], function(num) { return this.floor(num) % 2; }, Math);
+     * // => [[1, 3], [2]]
+     *
+     * var characters = [
+     *   { 'name': 'barney',  'age': 36 },
+     *   { 'name': 'fred',    'age': 40, 'blocked': true },
+     *   { 'name': 'pebbles', 'age': 1 }
+     * ];
+     *
+     * // using "_.where" callback shorthand
+     * _.map(_.partition(characters, { 'age': 1 }), function(array) { return _.pluck(array, 'name'); });
+     * // => [['pebbles'], ['barney', 'fred']]
+     *
+     * // using "_.pluck" callback shorthand
+     * _.map(_.partition(characters, 'blocked'), function(array) { return _.pluck(array, 'name'); });
+     * // => [['fred'], ['barney', 'pebbles']]
+     */
+    var partition = createAggregator(function(result, value, key) {
+      result[key ? 0 : 1].push(value);
+    }, true);
+
     /**
      * Retrieves the value of a specified property from all elements in the collection.
      *
@@ -7156,6 +7206,7 @@
     lodash.pairs = pairs;
     lodash.partial = partial;
     lodash.partialRight = partialRight;
+    lodash.partition = partition;
     lodash.pick = pick;
     lodash.pluck = pluck;
     lodash.property = property;
diff --git a/dist/lodash.min.js b/dist/lodash.min.js
index 286e1efde..7075038da 100644
--- a/dist/lodash.min.js
+++ b/dist/lodash.min.js
@@ -10,54 +10,54 @@
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diff --git a/dist/lodash.underscore.js b/dist/lodash.underscore.js
index 695de3c16..81d8d17fe 100644
--- a/dist/lodash.underscore.js
+++ b/dist/lodash.underscore.js
@@ -900,18 +900,20 @@
   }
 
   /**
-   * Creates a function that aggregates a collection, creating an object composed
-   * of keys generated from the results of running each element of the collection
+   * Creates a function that aggregates a collection, creating an object or
+   * array composed from the results of running each element of the collection
    * through a callback. The given `setter` function sets the keys and values
-   * of the composed object.
+   * of the composed object or array.
    *
    * @private
    * @param {Function} setter The setter function.
+   * @param {boolean} [retArray=false] A flag to indicate that the aggregator
+   *  function should return an array.
    * @returns {Function} Returns the new aggregator function.
    */
-  function createAggregator(setter) {
+  function createAggregator(setter, retArray) {
     return function(collection, callback, thisArg) {
-      var result = {};
+      var result = retArray ? [[], []] : {};
 
       callback = createCallback(callback, thisArg, 3);
       var index = -1,
diff --git a/dist/lodash.underscore.min.js b/dist/lodash.underscore.min.js
index 5c943ed29..5544cb9d8 100644
--- a/dist/lodash.underscore.min.js
+++ b/dist/lodash.underscore.min.js
@@ -3,39 +3,38 @@
  * Lo-Dash 2.4.1 (Custom Build) lodash.com/license | Underscore.js 1.5.2 underscorejs.org/LICENSE
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  */
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+},f.isElement=function(n){return n&&1===n.nodeType||false},f.isEmpty=J,f.isEqual=function(n,r){return m(n,r)},f.isFinite=function(n){return Lr(n)&&!Qr(parseFloat(n))},f.isFunction=K,f.isNaN=function(n){return Q(n)&&n!=+n},f.isNull=function(n){return null===n},f.isNumber=Q,f.isObject=L,f.isRegExp=function(n){var r=typeof n;return n&&("function"==r||"object"==r)&&Dr.call(n)==Tr||false},f.isString=X,f.isUndefined=function(n){return typeof n=="undefined"},f.lastIndexOf=function(n,r,t){var e=n?n.length:0;for(typeof t=="number"&&(e=(0>t?Yr(0,e+t):Zr(t,e-1))+1);e--;)if(n[e]===r)return e;
+return-1},f.mixin=tr,f.noConflict=function(){return Nr._=Mr,this},f.random=function(n,r){return null==n&&null==r&&(r=1),n=+n||0,null==r?(r=n,n=0):r=+r||0,n+Cr(rt()*(r-n+1))},f.reduce=M,f.reduceRight=D,f.result=function(n,r){if(null!=n){var t=n[r];return K(t)?n[r]():t}},f.size=function(n){var r=n?n.length:0;return typeof r=="number"?r:at(n).length},f.some=z,f.sortedIndex=k,f.template=function(n,r,t){var e=f,u=e.templateSettings;n=(n||"")+"",t=G({},t,u);var i=0,a="__p+='",u=t.variable;n.replace(RegExp((t.escape||yr).source+"|"+(t.interpolate||yr).source+"|"+(t.evaluate||yr).source+"|$","g"),function(r,t,e,u,f){return a+=n.slice(i,f).replace(mr,o),t&&(a+="'+_.escape("+t+")+'"),u&&(a+="';"+u+";\n__p+='"),e&&(a+="'+((__t=("+e+"))==null?'':__t)+'"),i=f+r.length,r
+}),a+="';",u||(u="obj",a="with("+u+"||{}){"+a+"}"),a="function("+u+"){var __t,__p='',__j=Array.prototype.join;function print(){__p+=__j.call(arguments,'')}"+a+"return __p}";try{var l=Function("_","return "+a)(e)}catch(c){throw c.source=a,c}return r?l(r):(l.source=a,l)},f.unescape=function(n){return null==n?"":(n+="",0>n.indexOf(";")?n:n.replace(vr,i))},f.uniqueId=function(n){var r=++gr+"";return n?n+r:r},f.all=q,f.any=z,f.detect=B,f.findWhere=function(n,r){return C(n,r,true)},f.foldl=M,f.foldr=D,f.include=N,f.inject=M,f.first=T,f.last=function(n,r,t){var e=0,u=n?n.length:0;
+if(typeof r!="number"&&null!=r){var o=u;for(r=Z(r,t,3);o--&&r(n[o],o,n);)e++}else if(e=r,null==e||t)return n?n[u-1]:ur;return e=u-e,O(n,0<e?e:0)},f.sample=function(n,r,t){return n&&typeof n.length!="number"&&(n=Y(n)),null==r||t?n?n[0+Cr(rt()*(n.length-1-0+1))]:ur:(n=W(n),n.length=Zr(Yr(0,r),n.length),n)},f.take=T,f.head=T,tr(V({},f)),f.VERSION="2.4.1",f.prototype.chain=function(){return this.__chain__=true,this},f.prototype.value=function(){return this.__wrapped__},v("pop push reverse shift sort splice unshift".split(" "),function(n){var r=$r[n];
+f.prototype[n]=function(){var n=this.__wrapped__;return r.apply(n,arguments),tt.spliceObjects||0!==n.length||delete n[0],this}}),v(["concat","join","slice"],function(n){var r=$r[n];f.prototype[n]=function(){var n=r.apply(this.__wrapped__,arguments);return this.__chain__&&(n=new a(n),n.__chain__=true),n}}),typeof define=="function"&&typeof define.amd=="object"&&define.amd?(Nr._=f, define(function(){return f})):qr&&Fr?Rr?(Fr.exports=f)._=f:qr._=f:Nr._=f}).call(this);
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diff --git a/lodash.js b/lodash.js
index dd16ec8ae..5dc1c7a88 100644
--- a/lodash.js
+++ b/lodash.js
@@ -1798,18 +1798,20 @@
     }
 
     /**
-     * Creates a function that aggregates a collection, creating an object composed
-     * of keys generated from the results of running each element of the collection
+     * Creates a function that aggregates a collection, creating an object or
+     * array composed from the results of running each element of the collection
      * through a callback. The given `setter` function sets the keys and values
-     * of the composed object.
+     * of the composed object or array.
      *
      * @private
      * @param {Function} setter The setter function.
+     * @param {boolean} [retArray=false] A flag to indicate that the aggregator
+     *  function should return an array.
      * @returns {Function} Returns the new aggregator function.
      */
-    function createAggregator(setter) {
+    function createAggregator(setter, retArray) {
       return function(collection, callback, thisArg) {
-        var result = {};
+        var result = retArray ? [[], []] : {};
 
         callback = lodash.createCallback(callback, thisArg, 3);
         if (isArray(collection)) {
@@ -4098,6 +4100,54 @@
       return result;
     }
 
+    /**
+     * Creates an array of grouped elements, the first of which contains elements
+     * the callback returns truey for, the second of which contains elements the
+     * callback returns falsey for. The callback is bound to `thisArg` and invoked
+     * with three arguments; (value, index|key, collection).
+     *
+     * If a property name is provided for `callback` the created "_.pluck" style
+     * callback will return the property value of the given element.
+     *
+     * If an object is provided for `callback` the created "_.where" style callback
+     * will return `true` for elements that have the properties of the given object,
+     * else `false`.
+     *
+     * @static
+     * @memberOf _
+     * @category Collections
+     * @param {Array|Object|string} collection The collection to iterate over.
+     * @param {Function|Object|string} [callback=identity] The function called
+     *  per iteration. If a property name or object is provided it will be used
+     *  to create a "_.pluck" or "_.where" style callback, respectively.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {Array} Returns a new array of grouped elements.
+     * @example
+     *
+     * _.partition([1, 2, 3], function(num) { return num % 2; });
+     * // => [[1, 3], [2]]
+     *
+     * _.partition([1.2, 2.3, 3.4], function(num) { return this.floor(num) % 2; }, Math);
+     * // => [[1, 3], [2]]
+     *
+     * var characters = [
+     *   { 'name': 'barney',  'age': 36 },
+     *   { 'name': 'fred',    'age': 40, 'blocked': true },
+     *   { 'name': 'pebbles', 'age': 1 }
+     * ];
+     *
+     * // using "_.where" callback shorthand
+     * _.map(_.partition(characters, { 'age': 1 }), function(array) { return _.pluck(array, 'name'); });
+     * // => [['pebbles'], ['barney', 'fred']]
+     *
+     * // using "_.pluck" callback shorthand
+     * _.map(_.partition(characters, 'blocked'), function(array) { return _.pluck(array, 'name'); });
+     * // => [['fred'], ['barney', 'pebbles']]
+     */
+    var partition = createAggregator(function(result, value, key) {
+      result[key ? 0 : 1].push(value);
+    }, true);
+
     /**
      * Retrieves the value of a specified property from all elements in the collection.
      *
@@ -7452,6 +7502,7 @@
     lodash.pairs = pairs;
     lodash.partial = partial;
     lodash.partialRight = partialRight;
+    lodash.partition = partition;
     lodash.pick = pick;
     lodash.pluck = pluck;
     lodash.property = property;
diff --git a/perf/perf.js b/perf/perf.js
index 4be112ef3..52c5cf5d5 100644
--- a/perf/perf.js
+++ b/perf/perf.js
@@ -1533,6 +1533,50 @@
 
   /*--------------------------------------------------------------------------*/
 
+  suites.push(
+    Benchmark.Suite('`_.partition` iterating an array')
+      .add(buildName, '\
+        lodash.partition(numbers, function(num) {\
+          return num % 2;\
+        })'
+      )
+      .add(otherName, '\
+        _.partition(numbers, function(num) {\
+          return num % 2;\
+        })'
+      )
+  );
+
+  suites.push(
+    Benchmark.Suite('`_.partition` iterating an array with `thisArg` (slow path)')
+      .add(buildName, '\
+        lodash.partition(numbers, function(num, index) {\
+          return this["key" + index] % 2;\
+        }, object)'
+      )
+      .add(otherName, '\
+        _.partition(numbers, function(num, index) {\
+           return this["key" + index] % 2;\
+        }, object)'
+      )
+  );
+
+  suites.push(
+    Benchmark.Suite('`_.partition` iterating an object')
+      .add(buildName, '\
+        lodash.partition(object, function(num) {\
+          return num % 2;\
+        })'
+      )
+      .add(otherName, '\
+        _.partition(object, function(num) {\
+          return num % 2;\
+        })'
+      )
+  );
+
+  /*--------------------------------------------------------------------------*/
+
   suites.push(
     Benchmark.Suite('`_.pick`')
       .add(buildName, '\
@@ -1657,12 +1701,12 @@
     Benchmark.Suite('`_.reject` iterating an object')
       .add(buildName, '\
         lodash.reject(object, function(num) {\
-          return num % 2\
+          return num % 2;\
         })'
       )
       .add(otherName, '\
         _.reject(object, function(num) {\
-          return num % 2\
+          return num % 2;\
         })'
       )
   );
diff --git a/test/test.js b/test/test.js
index d2897d3b6..eb4b510bd 100644
--- a/test/test.js
+++ b/test/test.js
@@ -6103,6 +6103,69 @@
 
   /*--------------------------------------------------------------------------*/
 
+  QUnit.module('lodash.partition');
+
+  (function() {
+    var array = [1, 0, 1];
+
+    test('should always return two groups of elements', 3, function() {
+      deepEqual(_.partition([], function(value) { return value; }), [[], []]);
+      deepEqual(_.partition(array, function(value) { return true; }), [array, []]);
+      deepEqual(_.partition(array, function(value) { return false; }), [[], array]);
+    });
+
+    test('should use `_.identity` when no `callback` is provided', 1, function() {
+      var actual = _.partition(array);
+      deepEqual(actual, [[1, 1], [0]]);
+    });
+
+    test('should pass the correct `callback` arguments', 1, function() {
+      var args;
+
+      _.partition(array, function() {
+        args || (args = slice.call(arguments));
+      });
+
+      deepEqual(args, [1, 0, array]);
+    });
+
+    test('should support the `thisArg` argument', 1, function() {
+      var actual = _.partition([1.1, 0.2, 1.3], function(num) {
+        return this.floor(num);
+      }, Math);
+
+      deepEqual(actual, [[1.1, 1.3], [0.2]]);
+    });
+
+    test('should work with an object for `collection`', 1, function() {
+      var actual = _.partition({ 'a': 1.1, 'b': 0.2, 'c': 1.3 }, function(num) {
+        return Math.floor(num);
+      });
+
+      deepEqual(actual, [[1.1, 1.3], [0.2]]);
+    });
+
+    test('should work with a number for `callback`', 2, function() {
+      var array = [
+        [1, 0],
+        [0, 1],
+        [1, 0]
+      ];
+
+      deepEqual(_.partition(array, 0), [[array[0], array[2]], [array[1]]]);
+      deepEqual(_.partition(array, 1), [[array[1]], [array[0], array[2]]]);
+    });
+
+    test('should work with a string for `callback`', 1, function() {
+      var objects = [{ 'a': 1 }, { 'a': 1 }, { 'b': 2 }],
+          actual = _.partition(objects, 'a');
+
+      deepEqual(actual, [objects.slice(0, 2), objects.slice(2)]);
+    });
+  }());
+
+  /*--------------------------------------------------------------------------*/
+
   QUnit.module('lodash.pick');
 
   (function() {
@@ -9129,7 +9192,7 @@
 
     var acceptFalsey = _.difference(allMethods, rejectFalsey);
 
-    test('should accept falsey arguments', 164, function() {
+    test('should accept falsey arguments', 165, function() {
       var emptyArrays = _.map(falsey, function() { return []; }),
           isExposed = '_' in root,
           oldDash = root._;