The Huron River is a 14.9-mile-long (24.0 km) waterway in the north central Ohio in the United States. The watershed drains large portions of Erie County and Huron County, the northeast corners of Seneca County and Crawford County, and northern portions of Richland County.
 The mouth is on Lake Erie at the city of Huron. The main branch of the river is formed when the East and West branches merge near Milan.
 The East Branch, 31.8 miles (51.2 km) long, rises west of Fitchville and flows west to North Fairfield, where it bends north and flows through Peru and Norwalk before reaching Milan.
 The West Branch is 54.5 miles (87.7 km) long.  It rises about 4 miles (6.4 km) south of Greenwich and four miles east of Shiloh, near the intersection of Gilger Road and Noble Road in northern Richland County's Blooming Grove Township.  This is within a few miles of the headwaters of both the southwest branch of the Vermilion River (which also flows north to Lake Erie) and Shipp Creek, which is part of the Ohio River watershed via the Black Fork, Mohican, Walhonding, and Muskingum rivers.  The West Branch of the Huron flows north and west from Blooming Grove Township through Huron County's Ripley Township, then back into Richland County's Cass Township and into Plymouth. It is here where the river bends north to flow across the Richland/Huron county line into Huron County's New Haven Township and into New Haven. It passes to the east of Willard, although other tributaries rise north of Willard.  Still in Huron County, the West Branch continues north through Greenfield Township, Peru Township, and Ridgefield Township. The West Branch continues north into Monroeville and through the balance of Ridgefield Township.  Next, the river crosses from Huron County into Erie County and then bends in an easterly direction through southern Oxford Township before reaching the confluence with the East Branch in the Milan State Wildlife Area.
 Note: Willard Marsh, within the Willard Marsh State Wildlife Area, feeds into both the West Branch of the Huron River and the Honey Creek tributary of the Sandusky River.  Also, there are numerous creeks, streams, and ditches that are unnamed tributaries in the Huron River basin.
 According to the Geographic Names Information System, the Huron River has also been known as:
 Similarly, the West and East branches have been referred to as the West and East forks.
 The Huron River had been given that name by European explorers at least by 1778, when it appears as such on a map by Hutchins. A much earlier map, by Evans in 1755, names it as the "Guahadahuri". (On that Evans map, because of the river's significant depth and navigability even at that early time, it was the only river denoted between Sandusky Bay and the Cuyahoga, but accurately being approx. one-fifth of the distance between the two.) Also in 1755, Pennsylvanian James Smith, who had been captured by Native-Americans and brought to this river to live among them,  recorded the river's name as the "Canesadooharie". Whichever one, or both,  "guahadahuri" or "canesadooharie", was the more phonetically accurate of a Native-American word, but the word's translation seems lost to obscurity.  In 1760, explorer George Croghan refers to the name of this river, also phonetically from its Native-American/Chippewa tribe name, as "Notowacy Thepy"; John Heckewelder recorded it as "Naudowessie Sipi", meaning "the River ("sipi") of the Huron ("Naudowessie") tribe". Some maps of the later-1700s also show the Huron River as "Bald Eagle Creek"; named for a large eagle's nest at its mouth at that time (although one later mapmaker from that time, erroneously denoted "Bald Eagle Creek" and "Guahadahuyi" as being two separate rivers).
 [sources: Indian Captivities (pp. 191–201) by Drake (publ.1852 by Derby and Miller); and Diary(1787-1791) of David Zeisberger, (publ.1885 by Robert Clarke and Co., Cinti.; Heckewelder's History, Manners, and Customs of the Indian Nations; publ.1876; and Diary(1804-1806) of G.S. Oppelt, Moravian Archives, Bethlehem, PA]
 Here is a detailed account of which roads cross over the West Branch of the Huron River; beginning at the headwaters near Shiloh in Richland County and ending at the confluence with the east branch near Milan in Erie County.
 Richland County
 Blooming Grove Township
 Huron County
 Ripley Township
 Village of Plymouth
 New Haven Township
 Greenfield Township
 Peru Township
 Ridgefield Township
 Village of Monroeville
 Ridgefield Township
 Erie County
 Oxford Township
 Milan Township
 Here is a detailed account of which roads cross over the East Branch of the Huron River; beginning at the headwaters near Fitchville in Huron County and ending at the confluence with the west branch near Milan in Erie County.
 Huron County
 Fitchville Township
 Fairfield Township
 Village of North Fairfield
 Fairfield Township
 Bronson Township
 Peru Township
 Ridgefield Township
 City of Norwalk
 Norwalk Township
 Erie County
 Milan Township
 Here is a detailed account of which roads cross over the main stem of the Huron River; beginning at the confluence of the East and West branches near Milan in Erie County and ending at Lake Erie near Huron in Erie County.
 Erie County
 Milan Township
 Huron Township
 City of Huron
 41°23′53″N 82°32′57″W﻿ / ﻿41.3981°N 82.5491°W﻿ / 41.3981; -82.5491