diff --git a/changelog.d/4666.feature b/changelog.d/4666.feature
index 421060f9f9..b3a3915eb0 100644
--- a/changelog.d/4666.feature
+++ b/changelog.d/4666.feature
@@ -1 +1 @@
-Allow registration to be handled by a worker instance.
+Allow registration and login to be handled by a worker instance.
diff --git a/changelog.d/4670.feature b/changelog.d/4670.feature
new file mode 100644
index 0000000000..b3a3915eb0
--- /dev/null
+++ b/changelog.d/4670.feature
@@ -0,0 +1 @@
+Allow registration and login to be handled by a worker instance.
diff --git a/docs/workers.rst b/docs/workers.rst
index 6ce7d88c11..3ba5879f76 100644
--- a/docs/workers.rst
+++ b/docs/workers.rst
@@ -222,11 +222,12 @@ following regular expressions::
     ^/_matrix/client/(api/v1|r0|unstable)/rooms/.*/context/.*$
     ^/_matrix/client/(api/v1|r0|unstable)/rooms/.*/members$
     ^/_matrix/client/(api/v1|r0|unstable)/rooms/.*/state$
+    ^/_matrix/client/(api/v1|r0|unstable)/login$
 
 Additionally, the following REST endpoints can be handled, but all requests must
 be routed to the same instance::
 
-    ^/_matrix/client/(api/v1|r0|unstable)/register$
+    ^/_matrix/client/(r0|unstable)/register$
 
 
 ``synapse.app.user_dir``
diff --git a/synapse/app/client_reader.py b/synapse/app/client_reader.py
index 9250b6c239..043b48f8f3 100644
--- a/synapse/app/client_reader.py
+++ b/synapse/app/client_reader.py
@@ -40,6 +40,7 @@ from synapse.replication.slave.storage.registration import SlavedRegistrationSto
 from synapse.replication.slave.storage.room import RoomStore
 from synapse.replication.slave.storage.transactions import SlavedTransactionStore
 from synapse.replication.tcp.client import ReplicationClientHandler
+from synapse.rest.client.v1.login import LoginRestServlet
 from synapse.rest.client.v1.room import (
     JoinedRoomMemberListRestServlet,
     PublicRoomListRestServlet,
@@ -94,6 +95,7 @@ class ClientReaderServer(HomeServer):
                     RoomStateRestServlet(self).register(resource)
                     RoomEventContextServlet(self).register(resource)
                     RegisterRestServlet(self).register(resource)
+                    LoginRestServlet(self).register(resource)
 
                     resources.update({
                         "/_matrix/client/r0": resource,
diff --git a/synapse/storage/registration.py b/synapse/storage/registration.py
index 3bc5def48e..9b9572890b 100644
--- a/synapse/storage/registration.py
+++ b/synapse/storage/registration.py
@@ -254,6 +254,47 @@ class RegistrationWorkerStore(SQLBaseStore):
             defer.returnValue(ret["guest_access_token"])
         defer.returnValue(None)
 
+    @defer.inlineCallbacks
+    def get_user_id_by_threepid(self, medium, address):
+        """Returns user id from threepid
+
+        Args:
+            medium (str): threepid medium e.g. email
+            address (str): threepid address e.g. me@example.com
+
+        Returns:
+            Deferred[str|None]: user id or None if no user id/threepid mapping exists
+        """
+        user_id = yield self.runInteraction(
+            "get_user_id_by_threepid", self.get_user_id_by_threepid_txn,
+            medium, address
+        )
+        defer.returnValue(user_id)
+
+    def get_user_id_by_threepid_txn(self, txn, medium, address):
+        """Returns user id from threepid
+
+        Args:
+            txn (cursor):
+            medium (str): threepid medium e.g. email
+            address (str): threepid address e.g. me@example.com
+
+        Returns:
+            str|None: user id or None if no user id/threepid mapping exists
+        """
+        ret = self._simple_select_one_txn(
+            txn,
+            "user_threepids",
+            {
+                "medium": medium,
+                "address": address
+            },
+            ['user_id'], True
+        )
+        if ret:
+            return ret['user_id']
+        return None
+
 
 class RegistrationStore(RegistrationWorkerStore,
                         background_updates.BackgroundUpdateStore):
@@ -613,47 +654,6 @@ class RegistrationStore(RegistrationWorkerStore,
         )
         defer.returnValue(ret)
 
-    @defer.inlineCallbacks
-    def get_user_id_by_threepid(self, medium, address):
-        """Returns user id from threepid
-
-        Args:
-            medium (str): threepid medium e.g. email
-            address (str): threepid address e.g. me@example.com
-
-        Returns:
-            Deferred[str|None]: user id or None if no user id/threepid mapping exists
-        """
-        user_id = yield self.runInteraction(
-            "get_user_id_by_threepid", self.get_user_id_by_threepid_txn,
-            medium, address
-        )
-        defer.returnValue(user_id)
-
-    def get_user_id_by_threepid_txn(self, txn, medium, address):
-        """Returns user id from threepid
-
-        Args:
-            txn (cursor):
-            medium (str): threepid medium e.g. email
-            address (str): threepid address e.g. me@example.com
-
-        Returns:
-            str|None: user id or None if no user id/threepid mapping exists
-        """
-        ret = self._simple_select_one_txn(
-            txn,
-            "user_threepids",
-            {
-                "medium": medium,
-                "address": address
-            },
-            ['user_id'], True
-        )
-        if ret:
-            return ret['user_id']
-        return None
-
     def user_delete_threepid(self, user_id, medium, address):
         return self._simple_delete(
             "user_threepids",