diff --git a/misc/tabledrag.js b/misc/tabledrag.js
index b566168..b599f1d 100644
--- a/misc/tabledrag.js
+++ b/misc/tabledrag.js
@@ -304,11 +304,6 @@ Drupal.tableDrag.prototype.makeDraggable = function (item) {
       $(self.oldRowElement).removeClass('drag-previous');
     }
 
-    // Hack for IE6 that flickers uncontrollably if select lists are moved.
-    if (navigator.userAgent.indexOf('MSIE 6.') != -1) {
-      $('select', this.table).css('display', 'none');
-    }
-
     // Hack for Konqueror, prevent the blur handler from firing.
     // Konqueror always gives links focus, even after returning false on mousedown.
     self.safeBlur = false;
@@ -562,11 +557,6 @@ Drupal.tableDrag.prototype.dropRow = function (event, self) {
     self.dragObject = null;
     $('body').removeClass('drag');
     clearInterval(self.scrollInterval);
-
-    // Hack for IE6 that flickers uncontrollably if select lists are moved.
-    if (navigator.userAgent.indexOf('MSIE 6.') != -1) {
-      $('select', this.table).css('display', 'block');
-    }
   }
 };
 
diff --git a/misc/vertical-tabs.css b/misc/vertical-tabs.css
index 10e8153..1f86bcf 100644
--- a/misc/vertical-tabs.css
+++ b/misc/vertical-tabs.css
@@ -2,15 +2,13 @@
 div.vertical-tabs {
   margin: 1em 0 1em 15em; /* LTR */
   border: 1px solid #ccc;
-  position: relative; /* IE6/7 */
+  position: relative; /* IE7 */
 }
 .vertical-tabs ul.vertical-tabs-list {
   width: 15em;
   list-style: none;
-  list-style-image: none; /* IE6 */
   border-top: 1px solid #ccc;
   padding: 0;
-  position: relative; /* IE6 */
   margin: -1px 0 -1px -15em; /* LTR */
   float: left; /* LTR */
 }
@@ -71,7 +69,3 @@ div.vertical-tabs {
   -webkit-box-sizing: border-box;
   box-sizing: border-box;
 }
-* html .vertical-tabs .form-type-textfield,
-* html .vertical-tabs .form-textarea-wrapper {
-  width: 95%; /* IE6 */
-}
diff --git a/modules/color/color.js b/modules/color/color.js
index 43099ad..3e53ce1 100644
--- a/modules/color/color.js
+++ b/modules/color/color.js
@@ -43,14 +43,6 @@ Drupal.behaviors.color = {
       }
     }
 
-    // Fix preview background in IE6.
-    if (navigator.appVersion.match(/MSIE [0-6]\./)) {
-      var e = $('#preview #img')[0];
-      var image = e.currentStyle.backgroundImage;
-      e.style.backgroundImage = 'none';
-      e.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(enabled=true, sizingMethod=crop, src='" + image.substring(5, image.length - 2) + "')";
-    }
-
     // Set up colorScheme selector.
     $('#edit-scheme', form).change(function () {
       var schemes = settings.color.schemes, colorScheme = this.options[this.selectedIndex].value;
diff --git a/modules/overlay/overlay-child.css b/modules/overlay/overlay-child.css
index a832fc8..6fdda8a 100644
--- a/modules/overlay/overlay-child.css
+++ b/modules/overlay/overlay-child.css
@@ -134,15 +134,6 @@ html.js body {
 }
 
 /**
- * IE6 shows elements with position:fixed as position:static so replace
- * it with position:absolute;
- */
-* html #overlay-close,
-* html #overlay-close:hover {
-  position: absolute;
-}
-
-/**
  * Disable message.
  */
 #overlay-disable-message {
diff --git a/modules/overlay/overlay-parent.js b/modules/overlay/overlay-parent.js
index 8f11df6..af07b92 100644
--- a/modules/overlay/overlay-parent.js
+++ b/modules/overlay/overlay-parent.js
@@ -376,11 +376,6 @@ Drupal.overlay.eventhandlerOuterResize = function (event) {
     return;
   }
 
-  // IE6 uses position:absolute instead of position:fixed.
-  if (typeof document.body.style.maxHeight != 'string') {
-    this.activeFrame.height($(window).height());
-  }
-
   // Allow other scripts to respond to this event.
   $(document).trigger('drupalOverlayResize');
 };
@@ -410,7 +405,6 @@ Drupal.overlay.eventhandlerAlterDisplacedElements = function (event) {
 
   var documentHeight = this.iframeWindow.document.body.clientHeight;
   var documentWidth = this.iframeWindow.document.body.clientWidth;
-  // IE6 doesn't support maxWidth, use width instead.
   var maxWidthName = (typeof document.body.style.maxWidth == 'string') ? 'maxWidth' : 'width';
 
   // Consider any element that should be visible above the overlay (such as
@@ -825,11 +819,11 @@ Drupal.overlay.getDisplacement = function (region) {
  *   the entire page.
  */
 Drupal.overlay.makeDocumentUntabbable = function (context) {
-  // Manipulating tabindexes for the entire document is unacceptably slow in IE6
-  // and IE7, so in those browsers, the underlying page will still be reachable
-  // via the tab key. However, we still make the links within the Disable
-  // message unreachable, because the same message also exists within the
-  // child document. The duplicate copy in the underlying document is only for
+  // Manipulating tabindexes for the entire document is unacceptably slow in
+  // IE7, so in that browser, the underlying page will still be reachable via
+  // the tab key. However, we still make the links within the Disable message
+  // unreachable, because the same message also exists within the child
+  // document. The duplicate copy in the underlying document is only for
   // assisting screen-reader users navigating the document with reading commands
   // that follow markup order rather than tab order.
   if (jQuery.browser.msie && parseInt(jQuery.browser.version, 10) < 8) {
@@ -872,9 +866,9 @@ Drupal.overlay.makeDocumentUntabbable = function (context) {
  *   the entire page.
  */
 Drupal.overlay.makeDocumentTabbable = function (context) {
-  // Manipulating tabindexes is unacceptably slow in IE6 and IE7. In those
-  // browsers, the underlying page was never made unreachable via tab, so
-  // there is no work to be done here.
+  // Manipulating tabindexes is unacceptably slow in IE7. In that browser, the
+  // underlying page was never made unreachable via tab, so there is no work to
+  // be done here.
   if (jQuery.browser.msie && parseInt(jQuery.browser.version, 10) < 8) {
     return;
   }
@@ -886,7 +880,7 @@ Drupal.overlay.makeDocumentTabbable = function (context) {
   // tabindex attributes.
   var $tabindex = $('[tabindex]', context);
   if (jQuery.browser.msie && parseInt(jQuery.browser.version, 10) < 8) {
-    // removeAttr('tabindex') is broken in IE6-7, but the DOM function
+    // removeAttr('tabindex') is broken in IE7, but the DOM function
     // removeAttribute works.
     var i;
     var length = $tabindex.length;
diff --git a/modules/system/system.admin.css b/modules/system/system.admin.css
index 43340b5..7299484 100644
--- a/modules/system/system.admin.css
+++ b/modules/system/system.admin.css
@@ -243,7 +243,6 @@ table.screenshot {
 .exposed-filters .filters {
   float: left; /* LTR */
   margin-right: 1em; /* LTR */
-  width: 25em; /* IE6 */
 }
 .exposed-filters .form-item {
   margin: 0 0 0.1em 0;
diff --git a/modules/system/system.base.css b/modules/system/system.base.css
index a6748de..4ce63cf 100644
--- a/modules/system/system.base.css
+++ b/modules/system/system.base.css
@@ -227,7 +227,7 @@ html.js .js-hide {
  */
 .element-invisible {
   position: absolute !important;
-  clip: rect(1px 1px 1px 1px); /* IE6, IE7 */
+  clip: rect(1px 1px 1px 1px); /* IE7 */
   clip: rect(1px, 1px, 1px, 1px);
 }
 
@@ -253,10 +253,6 @@ html.js .js-hide {
   clear: both;
   visibility: hidden;
 }
-/* IE6 */
-* html .clearfix {
-  height: 1%;
-}
 /* IE7 */
 *:first-child + html .clearfix {
   min-height: 1%;
diff --git a/themes/bartik/css/ie6.css b/themes/bartik/css/ie6.css
deleted file mode 100644
index 435fab0..0000000
--- a/themes/bartik/css/ie6.css
+++ /dev/null
@@ -1,18 +0,0 @@
-
-#content {
-  overflow: hidden;
-}
-.form-item-search-block-form {
-  width: 50%;
-}
-.tabs ul.primary,
-.region-header .block-menu li a,
-.comment-form .form-item {
-  zoom: 1;
-}
-#block-search-form .form-item-search-block-form input {
-  width: 67%;
-}
-.node-teaser {
-  border-bottom: 1px solid #d3d7d9;
-}
diff --git a/themes/bartik/template.php b/themes/bartik/template.php
index d523a0a..8d2b8c4 100644
--- a/themes/bartik/template.php
+++ b/themes/bartik/template.php
@@ -23,7 +23,6 @@ function bartik_preprocess_html(&$variables) {
 
   // Add conditional stylesheets for IE
   drupal_add_css(path_to_theme() . '/css/ie.css', array('group' => CSS_THEME, 'browsers' => array('IE' => 'lte IE 7', '!IE' => FALSE), 'preprocess' => FALSE));
-  drupal_add_css(path_to_theme() . '/css/ie6.css', array('group' => CSS_THEME, 'browsers' => array('IE' => 'IE 6', '!IE' => FALSE), 'preprocess' => FALSE));
 }
 
 /**
diff --git a/themes/garland/fix-ie-rtl.css b/themes/garland/fix-ie-rtl.css
deleted file mode 100644
index fb1901b..0000000
--- a/themes/garland/fix-ie-rtl.css
+++ /dev/null
@@ -1,61 +0,0 @@
-
-body {
-  /* Center layout */
-  text-align: center;
-}
-
-#squeeze {
-  zoom: 1;
-  direction: ltr;
-}
-
-#squeeze .left-corner {
-  direction: rtl
-}
-
-#header-region,
-#wrapper #container {
-  /* Reset text alignment */
-  text-align: right;
-}
-
-#wrapper #container #center {
-  /* Reduce amount of damage done by extremely wide content */
-  overflow: hidden;
-}
-
-#wrapper #container #center .right-corner .left-corner {
-  /* Because of the lack of min-height, we use height as an alternative */
-  height: 400px;
-}
-
-fieldset {
-  /* Don't draw backgrounds on fieldsets in IE, as they look really bad. */
-  background: none;
-}
-
-/* Prevent fieldsets from shifting when changing collapsed state. */
-html.js fieldset.collapsible {
-  top: -1em;
-}
-
-html.js fieldset.collapsed {
-  top: 0;
-  margin-bottom: 1em;
-}
-
-tr.menu-disabled {
-  /* Use filter to emulate CSS3 opacity */
-  filter: alpha(opacity=50);
-}
-
-#header-region {
-  /* Because of the lack of min-height, we use height as an alternative */
-  height: 1em;
-}
-
-#attach-hide label,
-#uploadprogress div.message {
-  /* Fading elements in IE causes the text to bleed unless they have a background. */
-  background-color: #ffffff;
-}
diff --git a/themes/garland/fix-ie.css b/themes/garland/fix-ie.css
deleted file mode 100644
index 1a1c131..0000000
--- a/themes/garland/fix-ie.css
+++ /dev/null
@@ -1,65 +0,0 @@
-
-body {
-  /* Center layout */
-  text-align: center;
-}
-
-#header-region,
-#wrapper #container {
-  /* Reset text alignment */
-  text-align: left; /* LTR */
-}
-
-#wrapper #container #center {
-  /* Reduce amount of damage done by extremely wide content */
-  overflow: hidden;
-}
-
-#wrapper #container #center .right-corner .left-corner {
-  /* Because of the lack of min-height, we use height as an alternative */
-  height: 400px;
-}
-
-fieldset {
-  /* Don't draw backgrounds on fieldsets in IE, as they look really bad. */
-  background: none;
-}
-
-div.vertical-tabs ul.vertical-tabs-list li.first {
-  background-image: none;
-}
-
-ul.primary {
-  /* Fix missing top margin */
-  position: relative; /* LTR */
-/*  top: 0.5em; */
-}
-
-/* Prevent fieldsets from shifting when changing collapsed state. */
-html.js fieldset.collapsible {
-  top: -1em;
-}
-html.js fieldset.collapsed {
-  top: 0;
-  margin-bottom: 1em;
-}
-
-tr.menu-disabled {
-  /* Use filter to emulate CSS3 opacity */
-  filter: alpha(opacity=50);
-}
-
-#header-region {
-  /* Because of the lack of min-height, we use height as an alternative */
-  height: 1em;
-}
-
-tr.taxonomy-term-preview {
-  filter: alpha(opacity=50);
-}
-
-#attach-hide label,
-#uploadprogress div.message {
-  /* Fading elements in IE causes the text to bleed unless they have a background. */
-  background-color: #ffffff;
-}
diff --git a/themes/garland/template.php b/themes/garland/template.php
index 1b144f1..fc09571 100644
--- a/themes/garland/template.php
+++ b/themes/garland/template.php
@@ -40,8 +40,6 @@ function garland_preprocess_html(&$vars) {
   if (theme_get_setting('garland_width') == 'fluid') {
     $vars['classes_array'][] = 'fluid-width';
   }
-  // Add conditional CSS for IE6.
-  drupal_add_css(path_to_theme() . '/fix-ie.css', array('group' => CSS_THEME, 'browsers' => array('IE' => 'lt IE 7', '!IE' => FALSE), 'preprocess' => FALSE));
 }
 
 /**
diff --git a/themes/seven/ie6.css b/themes/seven/ie6.css
deleted file mode 100644
index 7d1c320..0000000
--- a/themes/seven/ie6.css
+++ /dev/null
@@ -1,17 +0,0 @@
-
-ul.menu li,
-ul.menu li a,
-ul.links li,
-ul.links li a,
-.action-links,
-#page {
-  height: 1%;
-}
-#block-system-main ul.admin-list li a {
-  height: 1px;
-  position: relative;
-  display: block;
-}
-#block-system-main ul.admin-list li div.description a {
-  display: inline;
-}
diff --git a/themes/seven/template.php b/themes/seven/template.php
index 4582749..dbfffd5 100644
--- a/themes/seven/template.php
+++ b/themes/seven/template.php
@@ -18,8 +18,6 @@ function seven_preprocess_maintenance_page(&$vars) {
 function seven_preprocess_html(&$vars) {
   // Add conditional CSS for IE8 and below.
   drupal_add_css(path_to_theme() . '/ie.css', array('group' => CSS_THEME, 'browsers' => array('IE' => 'lte IE 8', '!IE' => FALSE), 'preprocess' => FALSE));
-  // Add conditional CSS for IE6.
-  drupal_add_css(path_to_theme() . '/ie6.css', array('group' => CSS_THEME, 'browsers' => array('IE' => 'lt IE 7', '!IE' => FALSE), 'preprocess' => FALSE));
 }
 
 /**
diff --git a/themes/seven/vertical-tabs.css b/themes/seven/vertical-tabs.css
index 4f66222..f06aade 100644
--- a/themes/seven/vertical-tabs.css
+++ b/themes/seven/vertical-tabs.css
@@ -87,7 +87,3 @@ div.vertical-tabs .vertical-tabs-panes legend {
   -webkit-box-sizing: border-box;
   box-sizing: border-box;
 }
-* html .vertical-tabs .form-type-textfield,
-* html .vertical-tabs .form-textarea-wrapper {
-  width: 95%; /* IE6 */
-}
diff --git a/themes/stark/layout.css b/themes/stark/layout.css
index 43bb93f..7e49d74 100644
--- a/themes/stark/layout.css
+++ b/themes/stark/layout.css
@@ -10,9 +10,7 @@
  * This layout method works reasonably well, but shouldn't be used on a
  * production site because it can break. For example, if an over-large image
  * (one that is wider than 20% of the viewport) is in the left sidebar, the
- * image will overlap with the #content to the right. The exception to this
- * is IE6 which will just hide the navigation block completely in these
- * instances due to a positioning bug.
+ * image will overlap with the #content to the right.
  */
 
 #content,