title: Portage River (Jackson County, Michigan)
text: # Portage River (Jackson County, Michigan)
  
  The Portage River is a 15.5-mile-long (24.9 km) river in the U.S. state of Michigan, flowing mostly southwesterly through northeast Jackson County.
  
  The Portage River rises at approximately 42°22′26″N 84°10′48″W﻿ / ﻿42.37389°N 84.18000°W﻿ / 42.37389; -84.18000 in the Portage Lake Swamp in the Waterloo State Recreation Area. The river flows mostly southwest into the Grand River at 42°18′54″N 84°23′42″W﻿ / ﻿42.31500°N 84.39500°W﻿ / 42.31500; -84.39500 in Blackman Charter Township just north of the city of Jackson. The Portage River forms the boundary between the townships of Henrietta and Leoni.
  
  ## Drainage basin
  
  The Portage River drains all or portions of the following administrative divisions:
  
  * Ingham County
     * Bunker Hill Township
     * Ingham Township
     * Stockbridge Township
  * Jackson County
     * Blackman Charter Township
     * Grass Lake Township
     * Henrietta Township
     * Leoni Township
     * Waterloo Township
  * Washtenaw County
     * Lyndon Township
     * Sylvan Township
  
  ## Named tributaries
  
  From the mouth:
  
  * (right) Wildcat Creek
     * Brill Lake
  * (right) outflow from
     * St. John Lake
     * Eagle Lake
     * Mud Lake
  * (left) Batteese Creek
     * Batteese Lake
     * Hewes Lake
  * (left) Orchard Creek
     * (left) Cahaogan Creek
     * (right) Thornapple Creek
        * (left) Pickett Drain
           * Standish Lake
        * (right) Jacobs Lake Drain
           * Jacobs Lake
  * (right) outflow from Portage Lake
  * Little Portage Lake
     * (right) outflow from series of lakes and small streams including
        * Locker Lake
        * Riley Lake
        * Notten Lake
        * Lehman Lake
     * (left) Honey Creek
     * Portage Lake Swamp
  