diff --git a/libs/community/langchain_community/llms/ollama.py b/libs/community/langchain_community/llms/ollama.py
index 01b1ce37e1894..73bf0d8fba644 100644
--- a/libs/community/langchain_community/llms/ollama.py
+++ b/libs/community/langchain_community/llms/ollama.py
@@ -1,5 +1,18 @@
+from __future__ import annotations
+
 import json
-from typing import Any, AsyncIterator, Dict, Iterator, List, Mapping, Optional, Union
+from typing import (
+    Any,
+    AsyncIterator,
+    Callable,
+    Dict,
+    Iterator,
+    List,
+    Mapping,
+    Optional,
+    Tuple,
+    Union,
+)
 
 import aiohttp
 import requests
@@ -132,6 +145,10 @@ class _OllamaCommon(BaseLanguageModel):
     tokens for authentication.
     """
 
+    auth: Union[Callable, Tuple, None] = None
+    """Additional auth tuple or callable to enable Basic/Digest/Custom HTTP Auth.
+    Expects the same format, type and values as requests.request auth parameter."""
+
     @property
     def _default_params(self) -> Dict[str, Any]:
         """Get the default parameters for calling Ollama."""
@@ -237,6 +254,7 @@ def _create_stream(
                 "Content-Type": "application/json",
                 **(self.headers if isinstance(self.headers, dict) else {}),
             },
+            auth=self.auth,
             json=request_payload,
             stream=True,
             timeout=self.timeout,
@@ -300,6 +318,7 @@ async def _acreate_stream(
                     "Content-Type": "application/json",
                     **(self.headers if isinstance(self.headers, dict) else {}),
                 },
+                auth=self.auth,
                 json=request_payload,
                 timeout=self.timeout,
             ) as response:
diff --git a/libs/community/tests/unit_tests/llms/test_ollama.py b/libs/community/tests/unit_tests/llms/test_ollama.py
index 6d6ce632a8f2e..04da4d137eea7 100644
--- a/libs/community/tests/unit_tests/llms/test_ollama.py
+++ b/libs/community/tests/unit_tests/llms/test_ollama.py
@@ -31,7 +31,7 @@ def test_pass_headers_if_provided(monkeypatch: MonkeyPatch) -> None:
         timeout=300,
     )
 
-    def mock_post(url, headers, json, stream, timeout):  # type: ignore[no-untyped-def]
+    def mock_post(url, headers, json, stream, timeout, auth):  # type: ignore[no-untyped-def]
         assert url == "https://ollama-hostname:8000/api/generate"
         assert headers == {
             "Content-Type": "application/json",
@@ -49,10 +49,35 @@ def mock_post(url, headers, json, stream, timeout):  # type: ignore[no-untyped-d
     llm.invoke("Test prompt")
 
 
+def test_pass_auth_if_provided(monkeypatch: MonkeyPatch) -> None:
+    llm = Ollama(
+        base_url="https://ollama-hostname:8000",
+        model="foo",
+        auth=("Test-User", "Test-Password"),
+        timeout=300,
+    )
+
+    def mock_post(url, headers, json, stream, timeout, auth):  # type: ignore[no-untyped-def]
+        assert url == "https://ollama-hostname:8000/api/generate"
+        assert headers == {
+            "Content-Type": "application/json",
+        }
+        assert json is not None
+        assert stream is True
+        assert timeout == 300
+        assert auth == ("Test-User", "Test-Password")
+
+        return mock_response_stream()
+
+    monkeypatch.setattr(requests, "post", mock_post)
+
+    llm.invoke("Test prompt")
+
+
 def test_handle_if_headers_not_provided(monkeypatch: MonkeyPatch) -> None:
     llm = Ollama(base_url="https://ollama-hostname:8000", model="foo", timeout=300)
 
-    def mock_post(url, headers, json, stream, timeout):  # type: ignore[no-untyped-def]
+    def mock_post(url, headers, json, stream, timeout, auth):  # type: ignore[no-untyped-def]
         assert url == "https://ollama-hostname:8000/api/generate"
         assert headers == {
             "Content-Type": "application/json",
@@ -72,7 +97,7 @@ def test_handle_kwargs_top_level_parameters(monkeypatch: MonkeyPatch) -> None:
     """Test that top level params are sent to the endpoint as top level params"""
     llm = Ollama(base_url="https://ollama-hostname:8000", model="foo", timeout=300)
 
-    def mock_post(url, headers, json, stream, timeout):  # type: ignore[no-untyped-def]
+    def mock_post(url, headers, json, stream, timeout, auth):  # type: ignore[no-untyped-def]
         assert url == "https://ollama-hostname:8000/api/generate"
         assert headers == {
             "Content-Type": "application/json",
@@ -120,7 +145,7 @@ def test_handle_kwargs_with_unknown_param(monkeypatch: MonkeyPatch) -> None:
     """
     llm = Ollama(base_url="https://ollama-hostname:8000", model="foo", timeout=300)
 
-    def mock_post(url, headers, json, stream, timeout):  # type: ignore[no-untyped-def]
+    def mock_post(url, headers, json, stream, timeout, auth):  # type: ignore[no-untyped-def]
         assert url == "https://ollama-hostname:8000/api/generate"
         assert headers == {
             "Content-Type": "application/json",
@@ -169,7 +194,7 @@ def test_handle_kwargs_with_options(monkeypatch: MonkeyPatch) -> None:
     """
     llm = Ollama(base_url="https://ollama-hostname:8000", model="foo", timeout=300)
 
-    def mock_post(url, headers, json, stream, timeout):  # type: ignore[no-untyped-def]
+    def mock_post(url, headers, json, stream, timeout, auth):  # type: ignore[no-untyped-def]
         assert url == "https://ollama-hostname:8000/api/generate"
         assert headers == {
             "Content-Type": "application/json",