diff --git a/litellm/router.py b/litellm/router.py
index db38df29f0..9200089d5b 100644
--- a/litellm/router.py
+++ b/litellm/router.py
@@ -3543,6 +3543,22 @@ class Router:
 
         return hash_object.hexdigest()
 
+    def _create_deployment(
+        self, model: dict, _model_name: str, _litellm_params: dict, _model_info: dict
+    ):
+        deployment = Deployment(
+            **model,
+            model_name=_model_name,
+            litellm_params=_litellm_params,  # type: ignore
+            model_info=_model_info,
+        )
+
+        deployment = self._add_deployment(deployment=deployment)
+
+        model = deployment.to_json(exclude_none=True)
+
+        self.model_list.append(model)
+
     def set_model_list(self, model_list: list):
         original_model_list = copy.deepcopy(model_list)
         self.model_list = []
@@ -3565,18 +3581,24 @@ class Router:
                 _id = self._generate_model_id(_model_name, _litellm_params)
                 _model_info["id"] = _id
 
-            deployment = Deployment(
-                **model,
-                model_name=_model_name,
-                litellm_params=_litellm_params,
-                model_info=_model_info,
-            )
-
-            deployment = self._add_deployment(deployment=deployment)
-
-            model = deployment.to_json(exclude_none=True)
-
-            self.model_list.append(model)
+            if _litellm_params.get("organization", None) is not None and isinstance(
+                _litellm_params["organization"], list
+            ):  # Addresses https://github.com/BerriAI/litellm/issues/3949
+                for org in _litellm_params["organization"]:
+                    _litellm_params["organization"] = org
+                    self._create_deployment(
+                        model=model,
+                        _model_name=_model_name,
+                        _litellm_params=_litellm_params,
+                        _model_info=_model_info,
+                    )
+            else:
+                self._create_deployment(
+                    model=model,
+                    _model_name=_model_name,
+                    _litellm_params=_litellm_params,
+                    _model_info=_model_info,
+                )
 
         verbose_router_logger.debug(f"\nInitialized Model List {self.model_list}")
         self.model_names = [m["model_name"] for m in model_list]
diff --git a/litellm/tests/test_router.py b/litellm/tests/test_router.py
index 9b52c7d57c..4cde1b55f7 100644
--- a/litellm/tests/test_router.py
+++ b/litellm/tests/test_router.py
@@ -1,24 +1,54 @@
 #### What this tests ####
 # This tests litellm router
 
-import sys, os, time, openai
-import traceback, asyncio
+import asyncio
+import os
+import sys
+import time
+import traceback
+
+import openai
 import pytest
 
 sys.path.insert(
     0, os.path.abspath("../..")
 )  # Adds the parent directory to the system path
+import os
+from collections import defaultdict
+from concurrent.futures import ThreadPoolExecutor
+
+import httpx
+from dotenv import load_dotenv
+
 import litellm
 from litellm import Router
 from litellm.router import Deployment, LiteLLM_Params, ModelInfo
-from concurrent.futures import ThreadPoolExecutor
-from collections import defaultdict
-from dotenv import load_dotenv
-import os, httpx
 
 load_dotenv()
 
 
+def test_router_multi_org_list():
+    """
+    Pass list of orgs in 1 model definition,
+    expect a unique deployment for each to be created
+    """
+    router = litellm.Router(
+        model_list=[
+            {
+                "model_name": "*",
+                "litellm_params": {
+                    "model": "openai/*",
+                    "api_key": "my-key",
+                    "api_base": "https://api.openai.com/v1",
+                    "organization": ["org-1", "org-2", "org-3"],
+                },
+            }
+        ]
+    )
+
+    assert len(router.get_model_list()) == 3
+
+
 def test_router_sensitive_keys():
     try:
         router = Router(
@@ -527,9 +557,10 @@ def test_router_context_window_fallback():
     - Send a 5k prompt
     - Assert it works
     """
-    from large_text import text
     import os
 
+    from large_text import text
+
     litellm.set_verbose = False
 
     print(f"len(text): {len(text)}")
@@ -577,9 +608,10 @@ async def test_async_router_context_window_fallback():
     - Send a 5k prompt
     - Assert it works
     """
-    from large_text import text
     import os
 
+    from large_text import text
+
     litellm.set_verbose = False
 
     print(f"len(text): {len(text)}")
@@ -660,9 +692,10 @@ def test_router_context_window_check_pre_call_check_in_group():
     - Send a 5k prompt
     - Assert it works
     """
-    from large_text import text
     import os
 
+    from large_text import text
+
     litellm.set_verbose = False
 
     print(f"len(text): {len(text)}")
@@ -708,9 +741,10 @@ def test_router_context_window_check_pre_call_check_out_group():
     - Send a 5k prompt
     - Assert it works
     """
-    from large_text import text
     import os
 
+    from large_text import text
+
     litellm.set_verbose = False
 
     print(f"len(text): {len(text)}")
@@ -1536,9 +1570,10 @@ def test_router_anthropic_key_dynamic():
 
 def test_router_timeout():
     litellm.set_verbose = True
-    from litellm._logging import verbose_logger
     import logging
 
+    from litellm._logging import verbose_logger
+
     verbose_logger.setLevel(logging.DEBUG)
     model_list = [
         {
diff --git a/litellm/types/router.py b/litellm/types/router.py
index aa63e95f54..da3c999dc8 100644
--- a/litellm/types/router.py
+++ b/litellm/types/router.py
@@ -2,12 +2,14 @@
 litellm.Router Types - includes RouterConfig, UpdateRouterConfig, ModelInfo etc
 """
 
-from typing import List, Optional, Union, Dict, Tuple, Literal, TypedDict
-import uuid
+import datetime
 import enum
+import uuid
+from typing import Dict, List, Literal, Optional, Tuple, TypedDict, Union
+
 import httpx
 from pydantic import BaseModel, ConfigDict, Field
-import datetime
+
 from .completion import CompletionRequest
 from .embedding import EmbeddingRequest
 
@@ -293,7 +295,7 @@ class LiteLLMParamsTypedDict(TypedDict, total=False):
     timeout: Optional[Union[float, str, httpx.Timeout]]
     stream_timeout: Optional[Union[float, str]]
     max_retries: Optional[int]
-    organization: Optional[str]  # for openai orgs
+    organization: Optional[Union[List, str]]  # for openai orgs
     ## DROP PARAMS ##
     drop_params: Optional[bool]
     ## UNIFIED PROJECT/REGION ##