diff --git a/google/cloud/pubsublite/admin_client.py b/google/cloud/pubsublite/admin_client.py
index 6c010e34..d1882ef8 100644
--- a/google/cloud/pubsublite/admin_client.py
+++ b/google/cloud/pubsublite/admin_client.py
@@ -1,8 +1,12 @@
 from abc import ABC, abstractmethod
 from typing import List
 
-from google.cloud.pubsublite.location import CloudRegion
-from google.cloud.pubsublite.paths import TopicPath, LocationPath, SubscriptionPath
+from google.cloud.pubsublite.types import (
+    CloudRegion,
+    TopicPath,
+    LocationPath,
+    SubscriptionPath,
+)
 from google.cloud.pubsublite_v1 import Topic, Subscription
 from google.protobuf.field_mask_pb2 import FieldMask
 
diff --git a/google/cloud/pubsublite/cloudpubsub/internal/assigning_subscriber.py b/google/cloud/pubsublite/cloudpubsub/internal/assigning_subscriber.py
index 9d667141..21a0cacb 100644
--- a/google/cloud/pubsublite/cloudpubsub/internal/assigning_subscriber.py
+++ b/google/cloud/pubsublite/cloudpubsub/internal/assigning_subscriber.py
@@ -7,7 +7,7 @@
 from google.cloud.pubsublite.internal.wait_ignore_cancelled import wait_ignore_cancelled
 from google.cloud.pubsublite.internal.wire.assigner import Assigner
 from google.cloud.pubsublite.internal.wire.permanent_failable import PermanentFailable
-from google.cloud.pubsublite.partition import Partition
+from google.cloud.pubsublite.types import Partition
 
 PartitionSubscriberFactory = Callable[[Partition], AsyncSubscriber]
 
diff --git a/google/cloud/pubsublite/cloudpubsub/make_publisher.py b/google/cloud/pubsublite/cloudpubsub/make_publisher.py
index 487eea2d..390afbdf 100644
--- a/google/cloud/pubsublite/cloudpubsub/make_publisher.py
+++ b/google/cloud/pubsublite/cloudpubsub/make_publisher.py
@@ -15,7 +15,7 @@
 )
 from google.cloud.pubsublite.internal.wire.merge_metadata import merge_metadata
 from google.cloud.pubsublite.internal.wire.pubsub_context import pubsub_context
-from google.cloud.pubsublite.paths import TopicPath
+from google.cloud.pubsublite.types import TopicPath
 
 
 DEFAULT_BATCHING_SETTINGS = WIRE_DEFAULT_BATCHING
diff --git a/google/cloud/pubsublite/cloudpubsub/make_subscriber.py b/google/cloud/pubsublite/cloudpubsub/make_subscriber.py
index 01e3c486..3b59bf93 100644
--- a/google/cloud/pubsublite/cloudpubsub/make_subscriber.py
+++ b/google/cloud/pubsublite/cloudpubsub/make_subscriber.py
@@ -31,7 +31,7 @@
     AsyncSubscriber,
     MessageCallback,
 )
-from google.cloud.pubsublite.endpoints import regional_endpoint
+from google.cloud.pubsublite.internal.endpoints import regional_endpoint
 from google.cloud.pubsublite.internal.wire.assigner import Assigner
 from google.cloud.pubsublite.internal.wire.assigner_impl import AssignerImpl
 from google.cloud.pubsublite.internal.wire.committer_impl import CommitterImpl
@@ -42,9 +42,10 @@
 from google.cloud.pubsublite.internal.wire.merge_metadata import merge_metadata
 from google.cloud.pubsublite.internal.wire.pubsub_context import pubsub_context
 import google.cloud.pubsublite.internal.wire.subscriber_impl as wire_subscriber
-from google.cloud.pubsublite.partition import Partition
-from google.cloud.pubsublite.paths import SubscriptionPath
-from google.cloud.pubsublite.routing_metadata import subscription_routing_metadata
+from google.cloud.pubsublite.types import Partition, SubscriptionPath
+from google.cloud.pubsublite.internal.routing_metadata import (
+    subscription_routing_metadata,
+)
 from google.cloud.pubsublite_v1 import (
     SubscribeRequest,
     InitialSubscribeRequest,
diff --git a/google/cloud/pubsublite/endpoints.py b/google/cloud/pubsublite/internal/endpoints.py
similarity index 100%
rename from google/cloud/pubsublite/endpoints.py
rename to google/cloud/pubsublite/internal/endpoints.py
diff --git a/google/cloud/pubsublite/routing_metadata.py b/google/cloud/pubsublite/internal/routing_metadata.py
similarity index 100%
rename from google/cloud/pubsublite/routing_metadata.py
rename to google/cloud/pubsublite/internal/routing_metadata.py
diff --git a/google/cloud/pubsublite/status_codes.py b/google/cloud/pubsublite/internal/status_codes.py
similarity index 100%
rename from google/cloud/pubsublite/status_codes.py
rename to google/cloud/pubsublite/internal/status_codes.py
diff --git a/google/cloud/pubsublite/internal/wire/admin_client_impl.py b/google/cloud/pubsublite/internal/wire/admin_client_impl.py
index b254b1d7..5fd5b56f 100644
--- a/google/cloud/pubsublite/internal/wire/admin_client_impl.py
+++ b/google/cloud/pubsublite/internal/wire/admin_client_impl.py
@@ -3,8 +3,12 @@
 from google.protobuf.field_mask_pb2 import FieldMask
 
 from google.cloud.pubsublite.admin_client import AdminClient
-from google.cloud.pubsublite.location import CloudRegion
-from google.cloud.pubsublite.paths import SubscriptionPath, LocationPath, TopicPath
+from google.cloud.pubsublite.types import (
+    CloudRegion,
+    SubscriptionPath,
+    LocationPath,
+    TopicPath,
+)
 from google.cloud.pubsublite_v1 import (
     Subscription,
     Topic,
diff --git a/google/cloud/pubsublite/internal/wire/assigner.py b/google/cloud/pubsublite/internal/wire/assigner.py
index 1bd1a8a3..9ab06991 100644
--- a/google/cloud/pubsublite/internal/wire/assigner.py
+++ b/google/cloud/pubsublite/internal/wire/assigner.py
@@ -1,7 +1,7 @@
 from abc import abstractmethod
 from typing import AsyncContextManager, Set
 
-from google.cloud.pubsublite.partition import Partition
+from google.cloud.pubsublite.types import Partition
 
 
 class Assigner(AsyncContextManager):
diff --git a/google/cloud/pubsublite/internal/wire/assigner_impl.py b/google/cloud/pubsublite/internal/wire/assigner_impl.py
index 07a0acc1..fe6962b7 100644
--- a/google/cloud/pubsublite/internal/wire/assigner_impl.py
+++ b/google/cloud/pubsublite/internal/wire/assigner_impl.py
@@ -12,7 +12,7 @@
     ConnectionReinitializer,
 )
 from google.cloud.pubsublite.internal.wire.connection import Connection
-from google.cloud.pubsublite.partition import Partition
+from google.cloud.pubsublite.types import Partition
 from google.cloud.pubsublite_v1.types import (
     PartitionAssignmentRequest,
     PartitionAssignment,
diff --git a/google/cloud/pubsublite/internal/wire/default_routing_policy.py b/google/cloud/pubsublite/internal/wire/default_routing_policy.py
index 90858ab9..75021c31 100644
--- a/google/cloud/pubsublite/internal/wire/default_routing_policy.py
+++ b/google/cloud/pubsublite/internal/wire/default_routing_policy.py
@@ -2,7 +2,7 @@
 import random
 
 from google.cloud.pubsublite.internal.wire.routing_policy import RoutingPolicy
-from google.cloud.pubsublite.partition import Partition
+from google.cloud.pubsublite.types import Partition
 from google.cloud.pubsublite_v1.types import PubSubMessage
 
 
diff --git a/google/cloud/pubsublite/internal/wire/fixed_set_assigner.py b/google/cloud/pubsublite/internal/wire/fixed_set_assigner.py
index 2a77fe8c..dbe94e8f 100644
--- a/google/cloud/pubsublite/internal/wire/fixed_set_assigner.py
+++ b/google/cloud/pubsublite/internal/wire/fixed_set_assigner.py
@@ -2,7 +2,7 @@
 from typing import Set
 
 from google.cloud.pubsublite.internal.wire.assigner import Assigner
-from google.cloud.pubsublite.partition import Partition
+from google.cloud.pubsublite.types import Partition
 
 
 class FixedSetAssigner(Assigner):
diff --git a/google/cloud/pubsublite/internal/wire/make_publisher.py b/google/cloud/pubsublite/internal/wire/make_publisher.py
index 7cd5d027..56e74162 100644
--- a/google/cloud/pubsublite/internal/wire/make_publisher.py
+++ b/google/cloud/pubsublite/internal/wire/make_publisher.py
@@ -3,7 +3,7 @@
 from google.cloud.pubsub_v1.types import BatchSettings
 
 from google.cloud.pubsublite.make_admin_client import make_admin_client
-from google.cloud.pubsublite.endpoints import regional_endpoint
+from google.cloud.pubsublite.internal.endpoints import regional_endpoint
 from google.cloud.pubsublite.internal.wire.default_routing_policy import (
     DefaultRoutingPolicy,
 )
@@ -16,9 +16,8 @@
 from google.cloud.pubsublite.internal.wire.single_partition_publisher import (
     SinglePartitionPublisher,
 )
-from google.cloud.pubsublite.partition import Partition
-from google.cloud.pubsublite.paths import TopicPath
-from google.cloud.pubsublite.routing_metadata import topic_routing_metadata
+from google.cloud.pubsublite.types import Partition, TopicPath
+from google.cloud.pubsublite.internal.routing_metadata import topic_routing_metadata
 from google.cloud.pubsublite_v1 import InitialPublishRequest, PublishRequest
 from google.cloud.pubsublite_v1.services.publisher_service import async_client
 from google.api_core.client_options import ClientOptions
diff --git a/google/cloud/pubsublite/internal/wire/publisher.py b/google/cloud/pubsublite/internal/wire/publisher.py
index 904d7d57..9ca07d7b 100644
--- a/google/cloud/pubsublite/internal/wire/publisher.py
+++ b/google/cloud/pubsublite/internal/wire/publisher.py
@@ -1,7 +1,7 @@
 from abc import abstractmethod
 from typing import AsyncContextManager
 from google.cloud.pubsublite_v1.types import PubSubMessage
-from google.cloud.pubsublite.publish_metadata import PublishMetadata
+from google.cloud.pubsublite.types import PublishMetadata
 
 
 class Publisher(AsyncContextManager):
diff --git a/google/cloud/pubsublite/internal/wire/retrying_connection.py b/google/cloud/pubsublite/internal/wire/retrying_connection.py
index a5a633cc..2d543253 100644
--- a/google/cloud/pubsublite/internal/wire/retrying_connection.py
+++ b/google/cloud/pubsublite/internal/wire/retrying_connection.py
@@ -2,7 +2,7 @@
 
 from typing import Awaitable, Optional
 from google.api_core.exceptions import GoogleAPICallError, Cancelled
-from google.cloud.pubsublite.status_codes import is_retryable
+from google.cloud.pubsublite.internal.status_codes import is_retryable
 from google.cloud.pubsublite.internal.wire.connection_reinitializer import (
     ConnectionReinitializer,
 )
diff --git a/google/cloud/pubsublite/internal/wire/routing_policy.py b/google/cloud/pubsublite/internal/wire/routing_policy.py
index 176b5914..8191fd8d 100644
--- a/google/cloud/pubsublite/internal/wire/routing_policy.py
+++ b/google/cloud/pubsublite/internal/wire/routing_policy.py
@@ -1,6 +1,6 @@
 from abc import ABC, abstractmethod
 
-from google.cloud.pubsublite.partition import Partition
+from google.cloud.pubsublite.types import Partition
 from google.cloud.pubsublite_v1.types.common import PubSubMessage
 
 
diff --git a/google/cloud/pubsublite/internal/wire/routing_publisher.py b/google/cloud/pubsublite/internal/wire/routing_publisher.py
index e62d9453..7e60d86c 100644
--- a/google/cloud/pubsublite/internal/wire/routing_publisher.py
+++ b/google/cloud/pubsublite/internal/wire/routing_publisher.py
@@ -2,8 +2,7 @@
 
 from google.cloud.pubsublite.internal.wire.publisher import Publisher
 from google.cloud.pubsublite.internal.wire.routing_policy import RoutingPolicy
-from google.cloud.pubsublite.partition import Partition
-from google.cloud.pubsublite.publish_metadata import PublishMetadata
+from google.cloud.pubsublite.types import Partition, PublishMetadata
 from google.cloud.pubsublite_v1 import PubSubMessage
 
 
diff --git a/google/cloud/pubsublite/internal/wire/single_partition_publisher.py b/google/cloud/pubsublite/internal/wire/single_partition_publisher.py
index b0167e57..80596502 100644
--- a/google/cloud/pubsublite/internal/wire/single_partition_publisher.py
+++ b/google/cloud/pubsublite/internal/wire/single_partition_publisher.py
@@ -18,8 +18,7 @@
     SerialBatcher,
     BatchTester,
 )
-from google.cloud.pubsublite.partition import Partition
-from google.cloud.pubsublite.publish_metadata import PublishMetadata
+from google.cloud.pubsublite.types import Partition, PublishMetadata
 from google.cloud.pubsublite_v1.types import (
     PubSubMessage,
     Cursor,
diff --git a/google/cloud/pubsublite/make_admin_client.py b/google/cloud/pubsublite/make_admin_client.py
index b05f8b09..5e4779e4 100644
--- a/google/cloud/pubsublite/make_admin_client.py
+++ b/google/cloud/pubsublite/make_admin_client.py
@@ -3,9 +3,9 @@
 from google.api_core.client_options import ClientOptions
 
 from google.cloud.pubsublite.admin_client import AdminClient
-from google.cloud.pubsublite.endpoints import regional_endpoint
+from google.cloud.pubsublite.internal.endpoints import regional_endpoint
 from google.cloud.pubsublite.internal.wire.admin_client_impl import AdminClientImpl
-from google.cloud.pubsublite.location import CloudRegion
+from google.cloud.pubsublite.types import CloudRegion
 from google.cloud.pubsublite_v1 import AdminServiceClient
 from google.auth.credentials import Credentials
 
diff --git a/google/cloud/pubsublite/types/__init__.py b/google/cloud/pubsublite/types/__init__.py
new file mode 100644
index 00000000..b94e0d78
--- /dev/null
+++ b/google/cloud/pubsublite/types/__init__.py
@@ -0,0 +1,4 @@
+from .location import CloudRegion, CloudZone
+from .partition import Partition
+from .paths import LocationPath, TopicPath, SubscriptionPath
+from .publish_metadata import PublishMetadata
diff --git a/google/cloud/pubsublite/location.py b/google/cloud/pubsublite/types/location.py
similarity index 100%
rename from google/cloud/pubsublite/location.py
rename to google/cloud/pubsublite/types/location.py
diff --git a/google/cloud/pubsublite/partition.py b/google/cloud/pubsublite/types/partition.py
similarity index 100%
rename from google/cloud/pubsublite/partition.py
rename to google/cloud/pubsublite/types/partition.py
diff --git a/google/cloud/pubsublite/paths.py b/google/cloud/pubsublite/types/paths.py
similarity index 97%
rename from google/cloud/pubsublite/paths.py
rename to google/cloud/pubsublite/types/paths.py
index d04945b5..66a09ba4 100644
--- a/google/cloud/pubsublite/paths.py
+++ b/google/cloud/pubsublite/types/paths.py
@@ -2,7 +2,7 @@
 
 from google.api_core.exceptions import InvalidArgument
 
-from google.cloud.pubsublite.location import CloudZone
+from google.cloud.pubsublite.types.location import CloudZone
 
 
 class LocationPath(NamedTuple):
diff --git a/google/cloud/pubsublite/publish_metadata.py b/google/cloud/pubsublite/types/publish_metadata.py
similarity index 90%
rename from google/cloud/pubsublite/publish_metadata.py
rename to google/cloud/pubsublite/types/publish_metadata.py
index fd4b57c6..869741e3 100644
--- a/google/cloud/pubsublite/publish_metadata.py
+++ b/google/cloud/pubsublite/types/publish_metadata.py
@@ -2,7 +2,7 @@
 import json
 
 from google.cloud.pubsublite_v1.types.common import Cursor
-from google.cloud.pubsublite.partition import Partition
+from google.cloud.pubsublite.types.partition import Partition
 
 
 class PublishMetadata(NamedTuple):
diff --git a/tests/unit/pubsublite/cloudpubsub/internal/assigning_subscriber_test.py b/tests/unit/pubsublite/cloudpubsub/internal/assigning_subscriber_test.py
index 8d4314e9..a0185fe2 100644
--- a/tests/unit/pubsublite/cloudpubsub/internal/assigning_subscriber_test.py
+++ b/tests/unit/pubsublite/cloudpubsub/internal/assigning_subscriber_test.py
@@ -13,7 +13,7 @@
 )
 from google.cloud.pubsublite.cloudpubsub.subscriber import AsyncSubscriber
 from google.cloud.pubsublite.internal.wire.assigner import Assigner
-from google.cloud.pubsublite.partition import Partition
+from google.cloud.pubsublite.types import Partition
 from google.cloud.pubsublite.testing.test_utils import wire_queues, Box
 
 # All test coroutines will be treated as marked.
diff --git a/tests/unit/pubsublite/internal/wire/assigner_impl_test.py b/tests/unit/pubsublite/internal/wire/assigner_impl_test.py
index 6a6294af..e35d4432 100644
--- a/tests/unit/pubsublite/internal/wire/assigner_impl_test.py
+++ b/tests/unit/pubsublite/internal/wire/assigner_impl_test.py
@@ -14,7 +14,7 @@
 )
 from google.api_core.exceptions import InternalServerError
 
-from google.cloud.pubsublite.partition import Partition
+from google.cloud.pubsublite.types import Partition
 from google.cloud.pubsublite_v1.types.subscriber import (
     PartitionAssignmentRequest,
     InitialPartitionAssignmentRequest,
diff --git a/tests/unit/pubsublite/internal/wire/default_routing_policy_test.py b/tests/unit/pubsublite/internal/wire/default_routing_policy_test.py
index 5d4db78d..9e7f0eff 100644
--- a/tests/unit/pubsublite/internal/wire/default_routing_policy_test.py
+++ b/tests/unit/pubsublite/internal/wire/default_routing_policy_test.py
@@ -1,7 +1,7 @@
 import json
 import os
 
-from google.cloud.pubsublite.partition import Partition
+from google.cloud.pubsublite.types import Partition
 
 from google.cloud.pubsublite.internal.wire.default_routing_policy import (
     DefaultRoutingPolicy,