# List of longest rivers of the United States

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The longest rivers of the United States include 38 that have main stems of at least 500 miles (800 km) long. The main stem is "the primary downstream segment of a river, as contrasted to its tributaries". The United States Geological Survey (USGS) defines a main-stem segment by listing coordinates for its two end points, called the source and the mouth. Some well-known rivers like the Atchafalaya, Willamette, and Susquehanna are not included in this list because their main stems are shorter than 500 miles.
Seven rivers in this list cross or form international boundaries. Three—the Milk River, the Red River of the North, and the Saint Lawrence River—begin in the United States and flow into Canada; two do the opposite (Yukon and Columbia). Also a segment of the Saint Lawrence River forms the international border between part of the province of Ontario, Canada, and the U.S. state of New York. Of these seven rivers, only the Milk River crosses the international border twice, leaving and then re-entering the United States. Two rivers, the Colorado and the Rio Grande, begin in the United States and flow into or form a border with Mexico. In addition, the drainage basins of the Mississippi and Missouri rivers extend into Canada, and the basin of the Gila River extends into Mexico.
Sources report hydrological quantities with varied precision. Biologist and author Ruth Patrick, describing a table of high-discharge U.S. rivers, wrote that data on discharge, drainage area, and length varied widely among authors whose works she consulted. "It seems," she said, "that the wisest course is to regard data tables such as the present one as showing the general ranks of rivers, and not to place too much importance on minor (10–20%) differences in figures."

## Table

The primary source for watershed and discharge data in the table below is Rivers of North America. Conflicting data from other sources, if the difference is greater than 10 percent, is reported in the notes. Discharge refers to the flow at the mouth. In the "States, provinces, and map" column, the superscripts "s" and "m" indicate "source" and "mouth". Non-U.S. states appear in italics. Except in the "States, provinces, and map" column, abbreviations are as follows: "km" for "kilometer", "mi" for "mile", "s" for "second", "m" for "meter", and "ft" for "foot".
Key :
* † River is not entirely within the United States.
* ‡ Watershed is not entirely within the United States.
Longest main-stem rivers of the United States :
| # | Name | Length | States, provinces, and map | Source coordinates | Mouth | Mouth coordinates | Watershed area | Discharge | Photo |
| 1 | Missouri River | 2,341 mi 3,768 km | Montana$^s$, North Dakota, South Dakota, Nebraska, Iowa, Kansas, Missouri$^m$ | 45°55′39″N 111°30′29″W﻿ / ﻿45.92750°N 111.50806°W﻿ / 45.92750; -111.50806﻿ (Missouri River (source)) | Mississippi River | 38°48′49″N 90°07′11″W﻿ / ﻿38.81361°N 90.11972°W﻿ / 38.81361; -90.11972﻿ (Missouri River (mouth)) | 529,353 mi$^2$ 1,371,017 km$^2$ ‡ | 69,100 ft$^3$/s 1,956 m$^3$/s | |
| 2 | Mississippi River | 2,340mi 3,766 km | Minnesota$^s$, Wisconsin, Iowa, Illinois, Missouri, Kentucky, Tennessee, Arkansas, Mississippi, Louisiana$^m$ | 47°14′22″N 95°12′29″W﻿ / ﻿47.23944°N 95.20806°W﻿ / 47.23944; -95.20806﻿ (Mississippi River (source)) | Gulf of Mexico | 29°09′04″N 89°15′12″W﻿ / ﻿29.15111°N 89.25333°W﻿ / 29.15111; -89.25333﻿ (Mississippi River (mouth)) | 1,260,000 mi$^2$ 3,270,000 km$^2$ ‡ | 650,000 ft$^3$/s 18,400 m$^3$/s | |
| 3 | Yukon River | 1,979 mi 3,190 km † | British Columbia$^s$, Yukon Territory, Alaska$^m$ | 59°35′00″N 133°47′00″W﻿ / ﻿59.58333°N 133.78333°W﻿ / 59.58333; -133.78333﻿ (Yukon River (source)) | Bering Sea | 62°35′55″N 164°48′00″W﻿ / ﻿62.59861°N 164.80000°W﻿ / 62.59861; -164.80000﻿ (Yukon River (mouth)) | 324,000 mi$^2$ 839,200 km$^2$ ‡ | 224,000 ft$^3$/s 6,340 m$^3$/s | |
| 4 | Rio Grande | 1,759 mi 2,830 km † | Colorado$^s$, New Mexico, Texas$^m$, Chihuahua, Coahuila, Nuevo León, Tamaulipas$^m$ | 37°47′52″N 107°32′18″W﻿ / ﻿37.79778°N 107.53833°W﻿ / 37.79778; -107.53833﻿ (Rio Grande (source)) | Gulf of Mexico | 25°57′22″N 97°08′43″W﻿ / ﻿25.95611°N 97.14528°W﻿ / 25.95611; -97.14528﻿ (Rio Grande (mouth)) | 340,000 mi$^2$ 870,000 km$^2$ ‡ | 1,300 ft$^3$/s 37 m$^3$/s | |
| 5 | Colorado River | 1,450 mi 2,330 km † | Colorado$^s$, Utah, Arizona, Nevada, California, Sonora$^m$, Baja California$^m$ | 40°28′20″N 105°49′34″W﻿ / ﻿40.47222°N 105.82611°W﻿ / 40.47222; -105.82611﻿ (Colorado River (source)) | Gulf of California | 31°48′57″N 114°48′22″W﻿ / ﻿31.81583°N 114.80611°W﻿ / 31.81583; -114.80611﻿ (Colorado River (mouth)) | 248,000 mi$^2$ 642,000 km$^2$ ‡ | 1,400 ft$^3$/s 40 m$^3$/s | |
| 6 | Arkansas River | 1,443 mi 2,322 km | Colorado$^s$, Kansas, Oklahoma, Arkansas$^m$ | 39°15′30″N 106°20′38″W﻿ / ﻿39.25833°N 106.34389°W﻿ / 39.25833; -106.34389﻿ (Arkansas River (source)) | Mississippi River | 33°46′30″N 91°04′15″W﻿ / ﻿33.77500°N 91.07083°W﻿ / 33.77500; -91.07083﻿ (Arkansas River (mouth)) | 160,200 mi$^2$ 414,910 km$^2$ | 35,500 ft$^3$/s 1,004 m$^3$/s | |
| 7 | Columbia River | 1,243 mi 2,000 km † | British Columbia$^s$, Washington$^m$, Oregon$^m$ | 50°13′00″N 115°51′00″W﻿ / ﻿50.21667°N 115.85000°W﻿ / 50.21667; -115.85000﻿ (Columbia River (source)) | Pacific Ocean | 46°14′39″N 124°03′29″W﻿ / ﻿46.24417°N 124.05806°W﻿ / 46.24417; -124.05806﻿ (Columbia River (mouth)) | 279,548 mi$^2$ 724,024 km$^2$ ‡ | 273,000 ft$^3$/s 7,730 m$^3$/s | |
| 8 | Red River | 1,125 mi 1,811 km | Oklahoma$^s$, Texas, Arkansas, Louisiana$^m$ | 34°34′35″N 99°57′54″W﻿ / ﻿34.57639°N 99.96500°W﻿ / 34.57639; -99.96500﻿ (Red River (source)) | Atchafalaya and Mississippi rivers | 31°01′10″N 91°44′52″W﻿ / ﻿31.01944°N 91.74778°W﻿ / 31.01944; -91.74778﻿ (Red River (mouth)) | 65,590 mi$^2$ 169,890 km$^2$ | 30,100 ft$^3$/s 852 m$^3$/s | |
| 9 | Snake River | 1,040 mi 1,674 km | Wyoming$^s$, Idaho, Oregon, Washington$^m$ | 44°07′49″N 110°13′10″W﻿ / ﻿44.13028°N 110.21944°W﻿ / 44.13028; -110.21944﻿ (Snake River (source)) | Columbia River | 46°11′10″N 119°01′43″W﻿ / ﻿46.18611°N 119.02861°W﻿ / 46.18611; -119.02861﻿ (Snake River (mouth)) | 108,000 mi$^2$ 281,000 km$^2$ | 55,300 ft$^3$/s 1,565 m$^3$/s | |
| 10 | Ohio River | 979 mi 1,575 km | Pennsylvania$^s$, Ohio, West Virginia, Indiana, Illinois, Kentucky$^m$ | 40°26′34″N 80°01′02″W﻿ / ﻿40.44278°N 80.01722°W﻿ / 40.44278; -80.01722﻿ (Ohio River (source)) | Mississippi River | 36°59′12″N 89°07′50″W﻿ / ﻿36.98667°N 89.13056°W﻿ / 36.98667; -89.13056﻿ (Ohio River (mouth)) | 204,000 mi$^2$ 529,000 km$^2$ | 308,400 ft$^3$/s 8,733 m$^3$/s | |
| 11 | Colorado River of Texas | 970 mi 1,560 km | Texas$^{s,m}$ | 32°40′47″N 101°43′51″W﻿ / ﻿32.67972°N 101.73083°W﻿ / 32.67972; -101.73083﻿ (Colorado River of Texas (source))) | Gulf of Mexico | 28°35′41″N 95°58′59″W﻿ / ﻿28.59472°N 95.98306°W﻿ / 28.59472; -95.98306﻿ (Colorado River of Texas (mouth)) | 39,900 mi$^2$ 103,341 km$^2$ | 2,600 ft$^3$/s 75 m$^3$/s | |
| 12 | Tennessee River | 935 mi 1,504 km | Tennessee$^s$, Alabama, Mississippi, Kentucky$^m$ | 35°57′33″N 83°51′01″W﻿ / ﻿35.95917°N 83.85028°W﻿ / 35.95917; -83.85028﻿ (Tennessee River (source)) | Ohio River | 37°04′02″N 88°33′53″W﻿ / ﻿37.06722°N 88.56472°W﻿ / 37.06722; -88.56472﻿ (Tennessee River (mouth)) | 40,880 mi$^2$ 105,870 km$^2$ | 71,000 ft$^3$/s 2,000 m$^3$/s | |
| 13 | Canadian River | 906 mi 1,458 km | Colorado$^s$, New Mexico, Texas, Oklahoma$^m$ | 37°01′11″N 105°04′33″W﻿ / ﻿37.01972°N 105.07583°W﻿ / 37.01972; -105.07583﻿ (Canadian River (source)) | Arkansas River | 35°27′12″N 95°01′58″W﻿ / ﻿35.45333°N 95.03278°W﻿ / 35.45333; -95.03278﻿ (Canadian River (mouth)) | 47,130 mi$^2$ 122,070 km$^2$ | 6,100 ft$^3$/s 174 m$^3$/s | |
| 14 | Brazos River | 860 mi 1,390 km | Texas$^{s,m}$ | 33°16′07″N 100°00′37″W﻿ / ﻿33.26861°N 100.01028°W﻿ / 33.26861; -100.01028﻿ (Brazos River (source)) | Gulf of Mexico | 28°52′33″N 95°22′42″W﻿ / ﻿28.87583°N 95.37833°W﻿ / 28.87583; -95.37833﻿ (Brazos River (mouth)) | 44,620 mi$^2$ 115,566 km$^2$ | 8,800 ft$^3$/s 249 m$^3$/s | |
| 15 | Green River | 760 mi 1,230 km | Wyoming$^s$, Colorado, Utah$^m$ | 43°09′13″N 109°40′18″W﻿ / ﻿43.15361°N 109.67167°W﻿ / 43.15361; -109.67167﻿ (Green River (source)) | Colorado River | 38°11′21″N 109°53′07″W﻿ / ﻿38.18917°N 109.88528°W﻿ / 38.18917; -109.88528﻿ (Green River (mouth)) | 44,900 mi$^2$ 116,200 km$^2$ | 6,100 ft$^3$/s 172 m$^3$/s | |
| 16 | Pecos River | 730 mi 1,175 km | New Mexico$^s$, Texas$^m$ | 35°58′34″N 105°33′29″W﻿ / ﻿35.97611°N 105.55806°W﻿ / 35.97611; -105.55806﻿ (Pecos River (source)) | Rio Grande | 29°41′59″N 101°22′17″W﻿ / ﻿29.69972°N 101.37139°W﻿ / 29.69972; -101.37139﻿ (Pecos River (mouth)) | 44,000 mi$^2$ 113,960 km$^2$ | 71 ft$^3$/s 2 m$^3$/s | |
| 17 | White River (Arkansas) | 720 mi 1,159 km | Arkansas$^{s,m}$, Missouri | 35°50′20″N 93°36′16″W﻿ / ﻿35.83889°N 93.60444°W﻿ / 35.83889; -93.60444﻿ (White River (source)) | Mississippi River | 33°57′05″N 91°04′53″W﻿ / ﻿33.95139°N 91.08139°W﻿ / 33.95139; -91.08139﻿ (White River (mouth)) | 27,872 mi$^2$ 72,189 km$^2$ | 34,600 ft$^3$/s 979 m$^3$/s | |
| 18 | James River | 710 mi 1,140 km | North Dakota$^s$, South Dakota$^m$ | 47°28′53″N 99°51′32″W﻿ / ﻿47.48139°N 99.85889°W﻿ / 47.48139; -99.85889﻿ (James River (source)) | Missouri River | 42°52′17″N 97°17′26″W﻿ / ﻿42.87139°N 97.29056°W﻿ / 42.87139; -97.29056﻿ (James River (mouth)) | 20,942 mi$^2$ 54,240 km$^2$ | 854 ft$^3$/s 24.2 m$^3$/s | |
| 19 | Kuskokwim River | 702 mi 1,130 km | Alaska$^{s,m}$ | 63°05′16″N 154°38′33″W﻿ / ﻿63.08778°N 154.64250°W﻿ / 63.08778; -154.64250﻿ (Kuskokwim River (source)) | Bering Sea | 60°04′59″N 162°20′02″W﻿ / ﻿60.08306°N 162.33389°W﻿ / 60.08306; -162.33389﻿ (Kuskokwim River (mouth)) | 48,000 mi$^2$ 124,319 km$^2$ | 67,000 ft$^3$s 1,900 m$^3$/s | |
| 20 | Cimarron River | 698 mi 1,123 km | Oklahoma$^{s,m}$, Colorado, Kansas | 36°54′24″N 102°59′12″W﻿ / ﻿36.90667°N 102.98667°W﻿ / 36.90667; -102.98667﻿ ("Cimarron River (source)) | Arkansas River | 36°10′14″N 96°16′19″W﻿ / ﻿36.17056°N 96.27194°W﻿ / 36.17056; -96.27194﻿ (Cimarron River (mouth)) | 19,510 mi$^2$ 50,540 km$^2$ | 1,500 ft$^3$/s 42 m$^3$/s | |
| 21 | Cumberland River | 696 mi 1,120 km | Kentucky$^{s,m}$, Tennessee | 36°50′42″N 83°19′26″W﻿ / ﻿36.84500°N 83.32389°W﻿ / 36.84500; -83.32389﻿ (Cumberland River (source)) | Ohio River | 37°08′36″N 88°24′27″W﻿ / ﻿37.14333°N 88.40750°W﻿ / 37.14333; -88.40750﻿ (Cumberland River (mouth)) | 17,930 mi$^2$ 46,430 km$^2$ | 30,400 ft$^3$/s 862 m$^3$/s | |
| 22 | Yellowstone River | 678 mi 1,091 km | Wyoming$^s$, Montana, North Dakota$^m$ | 43°59′18″N 109°55′45″W﻿ / ﻿43.98833°N 109.92917°W﻿ / 43.98833; -109.92917﻿ (Yellowstone River (source)) | Missouri River | 47°58′42″N 103°58′56″W﻿ / ﻿47.97833°N 103.98222°W﻿ / 47.97833; -103.98222﻿ (Yellowstone River (mouth)) | 70,400 mi$^2$ 182,336 km$^2$ | 12,800 ft$^3$/s 362 m$^3$/s | |
| 23 | North Platte River | 665 mi 1,070 km | Colorado$^s$, Wyoming, Nebraska$^m$ | 40°38′23″N 106°24′19″W﻿ / ﻿40.63972°N 106.40528°W﻿ / 40.63972; -106.40528﻿ (North Platte River (source)) | Platte River | 41°06′50″N 100°40′33″W﻿ / ﻿41.11389°N 100.67583°W﻿ / 41.11389; -100.67583﻿ (North Platte River (mouth)) | 34,885 mi$^2$ 90,352 km$^2$ | 770 ft$^3$/s 21.9 m$^3$/s | |
| 24 | Milk River | 625 mi 1,005 km† | Alberta, Montana$^{s,m}$ | 48°51′20″N 113°01′10″W﻿ / ﻿48.85556°N 113.01944°W﻿ / 48.85556; -113.01944﻿ (Milk River (source)) | Missouri River | 48°03′26″N 106°19′07″W﻿ / ﻿48.05722°N 106.31861°W﻿ / 48.05722; -106.31861﻿ (Milk River (mouth)) | 22,332 mi$^2$ 57,839 km$^2$ ‡ | 670 ft$^3$/s 18.9 m$^3$/s | |
| 25 | Ouachita River | 605 mi 974 km | Arkansas$^s$, Louisiana$^m$ | 31°41′56″N 94°19′57″W﻿ / ﻿31.69889°N 94.33250°W﻿ / 31.69889; -94.33250﻿ (Ouachita River (source)) | Black River | 31°37′53″N 91°48′25″W﻿ / ﻿31.63139°N 91.80694°W﻿ / 31.63139; -91.80694﻿ (Ouachita River (mouth)) | 24,886 mi$^2$ 64,454 km$^2$ | 29,800 ft$^3$/s 843 m$^3$/s | |
| 26 | St. Lawrence River | 600 mi 965 km † | New York$^s$, Ontario$^s$, Quebec$^m$ | 44°05′55″N 76°23′28″W﻿ / ﻿44.09861°N 76.39111°W﻿ / 44.09861; -76.39111﻿ (St. Lawrence River (source)) | Gulf of St. Lawrence | 49°40′00″N 64°30′00″W﻿ / ﻿49.66667°N 64.50000°W﻿ / 49.66667; -64.50000﻿ (Saint Lawrence River (mouth)) | 620,000 mi$^2$ 1,600,000 km$^2$ ‡ | 440,000 ft$^3$/s 12,600 m$^3$/s | |
| 27 | Gila River | 600 mi 960 km | New Mexico$^s$, Arizona$^m$ | 33°10′47″N 108°12′22″W﻿ / ﻿33.17972°N 108.20611°W﻿ / 33.17972; -108.20611﻿ (Gila River (source)) | Colorado River | 32°43′11″N 114°33′19″W﻿ / ﻿32.71972°N 114.55528°W﻿ / 32.71972; -114.55528﻿ (Gila River (mouth)) | 57,850 mi$^2$ 149,832 km$^2$ ‡ | 210 ft$^3$/s 6 m$^3$/s | |
| 28 | Sheyenne River | 591 mi 951 km | North Dakota$^{s,m}$ | 47°41′46″N 100°29′52″W﻿ / ﻿47.69611°N 100.49778°W﻿ / 47.69611; -100.49778﻿ (Sheyenne River (source)) | Red River of the North | 47°01′25″N 96°49′31″W﻿ / ﻿47.02361°N 96.82528°W﻿ / 47.02361; -96.82528﻿ (Sheyenne River (mouth)) | 8,800 mi$^2$ 23,000 km$^2$ | 288 ft$^3$/s 8.2 m$^3$/s | |
| 29 | Tanana River | 584 mi 940 km | Alaska$^{s,m}$ | 63°02′57″N 141°51′52″W﻿ / ﻿63.04917°N 141.86444°W﻿ / 63.04917; -141.86444﻿ (Tanana River (source)) | Yukon River | 65°09′38″N 151°57′37″W﻿ / ﻿65.16056°N 151.96028°W﻿ / 65.16056; -151.96028﻿ (Tanana River (mouth)) | 44,000 mi$^2$ 114,000 km$^2$ | 41,800 ft$^3$/s 1,185 m$^3$/s | |
| 30 | Smoky Hill River | 576 mi 927 km | Colorado$^s$, Kansas$^m$ | 38°57′01″N 102°34′49″W﻿ / ﻿38.95028°N 102.58028°W﻿ / 38.95028; -102.58028﻿ (Smoky Hill River (source)) | Kansas River | 39°03′36″N 96°48′04″W﻿ / ﻿39.06000°N 96.80111°W﻿ / 39.06000; -96.80111﻿ (Smoky Hill (mouth)) | 19,260 mi$^2$ 49,900 km$^2$ | 1,542 ft$^3$/s 43.7 m$^3$/s | |
| 31 | Niobrara River | 568 mi 914 km | Wyoming$^s$, Nebraska$^m$ | 42°49′15″N 104°38′50″W﻿ / ﻿42.82083°N 104.64722°W﻿ / 42.82083; -104.64722﻿ (Niobrara River (source)) | Missouri River | 42°45′58″N 98°02′50″W﻿ / ﻿42.76611°N 98.04722°W﻿ / 42.76611; -98.04722﻿ (Niobrara River (mouth)) | 12,600 mi$^2$ 32,600 km$^2$ | 1,700 ft$^3$/s 49 m$^3$/s | A small river flows through a field of grass and yellow flowers. |
| 32 | Little Missouri River | 560 mi 900 km | Wyoming$^s$, Montana, South Dakota, North Dakota$^m$ | 44°32′25″N 104°59′57″W﻿ / ﻿44.54028°N 104.99917°W﻿ / 44.54028; -104.99917﻿ ("Little Missouri River (source)) | Missouri River | 47°36′38″N 102°52′24″W﻿ / ﻿47.61056°N 102.87333°W﻿ / 47.61056; -102.87333﻿ (Little Missouri River (mouth)) | 8,310 mi$^2$ 21,500 km$^2$ | 450 ft$^3$/s 13 m$^3$/s | |
| 33 | Sabine River | 553 mi 890 km | Texas$^s$, Louisiana$^m$ | 32°48′29″N 95°55′14″W﻿ / ﻿32.80806°N 95.92056°W﻿ / 32.80806; -95.92056﻿ (Sabine River (source)) | Gulf of Mexico | 29°59′08″N 93°47′26″W﻿ / ﻿29.98556°N 93.79056°W﻿ / 29.98556; -93.79056﻿ (Sabine River (mouth)) | 9,756 mi$^2$ 25,268 km$^2$ | 8,400 ft$^3$/s 238 m$^3$/s | |
| 34 | Red River of the North | 550 mi 890 km † | North Dakota$^s$, Minnesota$^s$, Manitoba$^m$ | 46°15′52″N 96°35′55″W﻿ / ﻿46.26444°N 96.59861°W﻿ / 46.26444; -96.59861﻿ (Red River of the North (source)) | Lake Winnipeg | 50°23′47″N 96°48′39″W﻿ / ﻿50.39639°N 96.81083°W﻿ / 50.39639; -96.81083﻿ (Red River (mouth)) | 111,000 mi$^2$ 287,500 km$^2$ ‡ | 8,300 ft$^3$/s 236 m$^3$/s | |
| 35 | Des Moines River | 525 mi 845 km | Minnesota$^s$, Missouri, Iowa$^m$ | 44°05′02″N 95°41′17″W﻿ / ﻿44.08389°N 95.68806°W﻿ / 44.08389; -95.68806﻿ (Des Moines (source)) | Mississippi River | 41°22′52″N 91°25′21″W﻿ / ﻿41.38111°N 91.42250°W﻿ / 41.38111; -91.42250﻿ (Des Moines River (mouth)) | 12,018 mi$^2$ 31,127 km$^2$ | 6,400 ft$^3$/s 182 m$^3$/s | |
| 36 | White River (Missouri River) | 506 mi 815 km | Nebraska$^s$, South Dakota$^m$ | 42°41′10″N 103°50′14″W﻿ / ﻿42.68611°N 103.83722°W﻿ / 42.68611; -103.83722﻿ (White River (source)) | Missouri River | 43°42′50″N 99°28′01″W﻿ / ﻿43.71389°N 99.46694°W﻿ / 43.71389; -99.46694﻿ (White River (mouth)) | 10,200 mi$^2$ 26,418 km$^2$ | 570 ft$^3$/s 16 m$^3$/s | |
| 37 | Trinity River | 506 mi 815 km | Texas$^{s,m}$ | 32°47′54″N 96°53′52″W﻿ / ﻿32.79833°N 96.89778°W﻿ / 32.79833; -96.89778﻿ (Trinity River (source)) | Galveston Bay | 29°44′35″N 94°42′12″W﻿ / ﻿29.74306°N 94.70333°W﻿ / 29.74306; -94.70333﻿ (Trinity River (mouth)) | 17,970 mi$^2$ 46,540 km$^2$ | 7,800 ft$^3$/s 222 m$^3$/s | |
| 38 | Wabash River | 503 mi 810 km | Ohio$^s$, Indiana$^m$, Illinois$^m$ | 40°21′07″N 84°45′57″W﻿ / ﻿40.35194°N 84.76583°W﻿ / 40.35194; -84.76583﻿ (Wabash River (source)) | Ohio River | 37°47′53″N 88°01′38″W﻿ / ﻿37.79806°N 88.02722°W﻿ / 37.79806; -88.02722﻿ (Wabash River (mouth)) | 32,950 mi$^2$ 85,340 km$^2$ | 1,001 ft$^3$/s 28 m$^3$/s | |