diff --git a/CHANGES b/CHANGES
index e7cf04313..de1cb32ed 100644
--- a/CHANGES
+++ b/CHANGES
@@ -19,6 +19,7 @@ Bugs fixed
 * #1911: ``-D`` option of ``sphinx-build`` does not override the ``extensions`` variable
 * #2789: `sphinx.ext.intersphinx` generates wrong hyperlinks if the inventory is given
 * parsing errors for caption of code-blocks are displayed in document (ref: #2845)
+* #2846: ``singlehtml`` builder does not include figure numbers
 
 Release 1.4.5 (released Jul 13, 2016)
 =====================================
diff --git a/sphinx/builders/html.py b/sphinx/builders/html.py
index f541daa1a..e19da2271 100644
--- a/sphinx/builders/html.py
+++ b/sphinx/builders/html.py
@@ -981,6 +981,26 @@ class SingleFileHTMLBuilder(StandaloneHTMLBuilder):
 
         return {self.config.master_doc: new_secnumbers}
 
+    def assemble_toc_fignumbers(self):
+        # Assemble toc_fignumbers to resolve figure numbers on SingleHTML.
+        # Merge all fignumbers to single fignumber.
+        #
+        # Note: current Sphinx has refid confliction in singlehtml mode.
+        #       To avoid the problem, it replaces key of secnumbers to
+        #       tuple of docname and refid.
+        #
+        #       There are related codes in inline_all_toctres() and
+        #       HTMLTranslter#add_fignumber().
+        new_fignumbers = {}
+        # {u'foo': {'figure': {'id2': (2,), 'id1': (1,)}}, u'bar': {'figure': {'id1': (3,)}}}
+        for docname, fignumlist in iteritems(self.env.toc_fignumbers):
+            for figtype, fignums in iteritems(fignumlist):
+                new_fignumbers.setdefault((docname, figtype), {})
+                for id, fignum in iteritems(fignums):
+                    new_fignumbers[(docname, figtype)][id] = fignum
+
+        return {self.config.master_doc: new_fignumbers}
+
     def get_doc_context(self, docname, body, metatags):
         # no relation links...
         toc = self.env.get_toctree_for(self.config.master_doc, self, False)
@@ -1017,6 +1037,7 @@ class SingleFileHTMLBuilder(StandaloneHTMLBuilder):
         self.info(bold('assembling single document... '), nonl=True)
         doctree = self.assemble_doctree()
         self.env.toc_secnumbers = self.assemble_toc_secnumbers()
+        self.env.toc_fignumbers = self.assemble_toc_fignumbers()
         self.info()
         self.info(bold('writing... '), nonl=True)
         self.write_doc_serialized(self.config.master_doc, doctree)
@@ -1069,6 +1090,7 @@ class SerializingHTMLBuilder(StandaloneHTMLBuilder):
         self.config_hash = ''
         self.tags_hash = ''
         self.imagedir = '_images'
+        self.current_docname = None
         self.theme = None       # no theme necessary
         self.templates = None   # no template bridge necessary
         self.init_translator_class()
diff --git a/sphinx/writers/html.py b/sphinx/writers/html.py
index 5dbe56597..6a30d4c3a 100644
--- a/sphinx/writers/html.py
+++ b/sphinx/writers/html.py
@@ -69,6 +69,7 @@ class HTMLTranslator(BaseTranslator):
             builder.config.highlight_language
         self.highlightopts = builder.config.highlight_options
         self.highlightlinenothreshold = sys.maxsize
+        self.docnames = [builder.current_docname]  # for singlehtml builder
         self.protect_literal_text = 0
         self.permalink_text = builder.config.html_add_permalinks
         # support backwards-compatible setting to a bool
@@ -82,10 +83,11 @@ class HTMLTranslator(BaseTranslator):
 
     def visit_start_of_file(self, node):
         # only occurs in the single-file builder
+        self.docnames.append(node['docname'])
         self.body.append('<span id="document-%s"></span>' % node['docname'])
 
     def depart_start_of_file(self, node):
-        pass
+        self.docnames.pop()
 
     def visit_desc(self, node):
         self.body.append(self.starttag(node, 'dl', CLASS=node['objtype']))
@@ -247,7 +249,7 @@ class HTMLTranslator(BaseTranslator):
                              self.secnumber_suffix)
         elif isinstance(node.parent, nodes.section):
             if self.builder.name == 'singlehtml':
-                docname = node.parent.get('docname')
+                docname = self.docnames[-1]
                 anchorname = '#' + node.parent['ids'][0]
                 if (docname, anchorname) not in self.builder.secnumbers:
                     anchorname = (docname, '')  # try first heading which has no anchor
@@ -264,14 +266,19 @@ class HTMLTranslator(BaseTranslator):
 
     def add_fignumber(self, node):
         def append_fignumber(figtype, figure_id):
-            if figure_id in self.builder.fignumbers.get(figtype, {}):
+            if self.builder.name == 'singlehtml':
+                key = (self.docnames[-1], figtype)
+            else:
+                key = figtype
+
+            if figure_id in self.builder.fignumbers.get(key, {}):
                 self.body.append('<span class="caption-number">')
                 prefix = self.builder.config.numfig_format.get(figtype)
                 if prefix is None:
                     msg = 'numfig_format is not defined for %s' % figtype
                     self.builder.warn(msg)
                 else:
-                    numbers = self.builder.fignumbers[figtype][figure_id]
+                    numbers = self.builder.fignumbers[key][figure_id]
                     self.body.append(prefix % '.'.join(map(str, numbers)) + ' ')
                     self.body.append('</span>')