diff --git a/lib/ex.coffee b/lib/ex.coffee
index 2923602..a1e5ad3 100644
--- a/lib/ex.coffee
+++ b/lib/ex.coffee
@@ -442,4 +442,24 @@ class Ex
             throw new CommandError("No such option: #{option}")
           optionProcessor()
 
+  sort: ({ range }) =>
+    editor = atom.workspace.getActiveTextEditor()
+    sortingRange = [[]]
+
+    # If no range is provided, the entire file should be sorted.
+    isMultiLine = range[1] - range[0] > 1
+    if isMultiLine
+      sortingRange = [[range[0], 0], [range[1] + 1, 0]]
+    else
+      sortingRange = [[0, 0], [editor.getLastBufferRow(), 0]]
+
+    # Store every bufferedRow string in an array.
+    textLines = []
+    for lineIndex in [sortingRange[0][0]..sortingRange[1][0] - 1]
+      textLines.push(editor.lineTextForBufferRow(lineIndex))
+
+    # Sort the array and join them together with newlines for writing back to the file.
+    sortedText = _.sortBy(textLines).join('\n') + '\n'
+    editor.buffer.setTextInRange(sortingRange, sortedText)
+
 module.exports = Ex
diff --git a/spec/ex-commands-spec.coffee b/spec/ex-commands-spec.coffee
index 4e3d839..2eb252a 100644
--- a/spec/ex-commands-spec.coffee
+++ b/spec/ex-commands-spec.coffee
@@ -983,3 +983,18 @@ describe "the commands", ->
       expect(calls.length).toEqual 2
       expect(calls[0].args[0].range).toEqual [0, 2]
       expect(calls[1].args[0].range).toEqual [3, 3]
+
+  describe ':sort', ->
+    beforeEach ->
+      editor.setText('ghi\nabc\njkl\ndef\n142\nzzz\n91xfds9\n')
+      editor.setCursorBufferPosition([0, 0])
+
+    it "sorts entire file if range is not multi-line", ->
+      openEx()
+      submitNormalModeInputText('sort')
+      expect(editor.getText()).toEqual('142\n91xfds9\nabc\ndef\nghi\njkl\nzzz\n')
+
+    it "sorts specific range if range is multi-line", ->
+      openEx()
+      submitNormalModeInputText('2,4sort')
+      expect(editor.getText()).toEqual('ghi\nabc\ndef\njkl\n142\nzzz\n91xfds9\n')