Hinds

Yazoo

Bolivar

Attala

Amite

Perry

Lee

Scott

Jones

Wayne

Rankin

Smith

Copiah

Clarke

Monroe

Panola

Jasper

Holmes

Kemper

Greene

Carroll

Leake

Pike

Clay

Tate

Jackson

Leflore

Madison

Warren

Marshall

Lincoln

Marion

Lamar

Noxubee

Stone

Newton

Winston

Pearl River

Lafayette

Wilkinson

Union

Tunica

Franklin

Sunflower

Calhoun

Desoto

Adams

Harrison

Simpson

Tippah

Forrest

George

Washington

Lauderdale

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Alcorn

Coahoma

Lowndes

Benton

Jefferson

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Hancock

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Sharkey

Claiborne

Prentiss

Grenada

Webster

Walthall

Choctaw

Quitman

Yalobusha Chickasaw

Oktibbeha

Lawrence

Issaquena

Covington

Tishomingo

Humphreys

Montgomery

Jefferson Davis

JACKSON

Biloxi

Gulfport

Tupelo

Meridian

Hattiesburg

Corinth

Vicksburg

Grenada

Starkville

Greenville

Canton

Laurel

Brandon

Booneville

Iuka

Columbus

Forest

West

Point

Ripley

Winona

Natchez

Louisville

Oxford

Pascagoula

New

Albany

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Wiggins

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Bay

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Hernando

Collins

Aberdeen

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Senatobia

Carthage

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City

Holly

Springs

Indianola

Houston

Philadelphia

Greenwood

Okolona

Kosciusko

Cleveland

Ellisville

Quitman

Columbia

Raleigh

Purvis

Decatur

Brookhaven

Rosedale

Water

Valley

Waynesboro

Mendenhall

Lucedale

De Kalb

Hazlehurst

New Augusta

Poplarville

Magnolia

Monticello

Tylertown

Vaiden

Sardis

Raymond

Liberty

Lexington

Prentiss

Ashland

Macon

Ackerman

Coffeeville

Marks

Fayette

Port Gibson

Leakesville

Belzoni

Charleston

Walthall

Rolling Fork

Meadville

Pittsboro

Woodville

Tunica

Mayersville

Carrollton

Sumner

Tishomingo

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12

01

08

02

03

02

02

03

02

04

02

03

03

01

06

04

06

05

05

04

02

01

05

03

05

01

03

06

09

04

06

03

11

01

03

02

01

05

10

04

10

04

03

07

08

01

04

02

06

04

06

02

06

07

09

02

03

03

07

03

03

06

04

03

10

07

07

01

02

01

02

06

06

02

03

01

12

02

02

06

01

01

06

03

05

02

05

05

06

02

04

02

06

04

05

03

10

02

01

03

10

05

02

07

03

03

05

02

10

05

01

02

06

01

02

05

10

01

01

05

03

04

03

03

05

02

01

08

05

02

09

03

05

03

07

04 03

02

05

01

07

03

04

04

02

04

05

03

04

01

02

04

04

02

06

03

03

05

07

01

04

02

03

06

10

04

08

07

03

03

07

05

06

02

07

02

02

01

02

02

04

04

04

01

03

02

05

03

03

04

01

02

01

01

03

04

02

01

05

02

08

02

08

06

01

02

04

02

08

03

03

02

02

00

01

02

06

04

08

05

04

03

04

03

01

03

02

04

08

03

08

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10

02

03

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08030207

03180001

03170009

03170009

08030205

03180002

08030204

08060202

03170005

03160101

03170004

08030206

08030201

03180004

08060201

03160106

03170002

03160108

03160201

03170007

03180003

08060205

03160104

08060203

08030202

03170008

03170008

08010207

03160202

03170001

03180005

08030209

08030203

08010210

03160102

03170003

03160103

03160105

03170006

08030100

08070202

08020100 06030006

06030005

08060206

08060204

06040001 08010211

08070205

08030208

08010208

08070201

08070203

08010100

08070100

08060100

08060100

35°

90° 89° 91°

34°

33°

32°

31°

The U.S. Geological Survey, in cooperation with the Mississippi Department 

of Environmental Quality, U.S. Department of Agriculture-Natural 

Resources Conservation Service, Mississippi Department of Transportation, 

U.S. Department of Agriculture-Forest Service, and the Mississippi Automated Resource Information System developed a 1:24,000-scale Watershed 

Boundary Dataset for Mississippi including watershed and subwatershed 

boundaries, codes, names, and areas. The Watershed Boundary Dataset for 

Mississippi provides a standard geographical framework for water-resources 

and selected land-resources planning. The original 8-digit subbasins 

(Hydrologic Unit Codes) were further subdivided into 10-digit watersheds 

(62.5 to 391 square miles (mi2)) and 12-digit subwatersheds (15.6 to 62.5 mi2) 

—the exceptions being the Delta part of Mississippi and the Mississippi 

River inside levees, which were subdivided into 10-digit watersheds only. 

Also, large water bodies in the Mississippi Sound along the coast were not 

delineated as small as a typical 12-digit subwatershed. All of the data— 

including watershed and subwatershed boundaries, subdivision codes and 

names, and drainage-area data—are stored in a Geographic Information 

System database, which are available at: http://ms.water.usgs.gov/.

This map shows information on drainage and hydrography in the form of 

U.S. Geological Survey hydrologic unit boundaries for water-resource 2-digit 

regions, 4-digit subregions, 6-digit basins (formerly called accounting units), 

8-digit subbasins (formerly called cataloging units), 10-digit watershed, and 

12-digit subwatersheds in Mississippi. A description of the project study area, 

methods used in the development of watershed and subwatershed boundaries 

for Mississippi, and results are presented in Wilson and others (2008). The 

data presented in this map and by Wilson and others (2008) supersede the 

data presented for Mississippi by Seaber and others (1987) and U.S. Geological Survey (1977).

REFERENCES

Seaber, P.R., Kapinos, F.P., and Knapp, G.L., 1987, Hydrologic Unit Maps: 

U.S. Geological Survey Water Supply Paper 2294, 63 p.

Wilson, K.V., Jr., Clair, M.G., II, Rebich, R.A., and Turnipseed, D.P., 2008, 

Development of a watershed boundary dataset for Mississippi: U.S. Geological Survey Open File Report 2008-1198.

U.S. Geological Survey, 1977, Hydrologic Unit Map-1974, State of Mississippi: Scale 1:500,000.

080302070100

Region

Subregion

Basin

Subbasin

Watershed

Subwatershed

EXPLANATION

WATERSHED BOUNDARY DATASET FOR MISSISSIPPI

By K. Van Wilson, Jr., Michael G. Clair II, D. Phil Turnipseed, and Richard A. Rebich

Hydrologic Unit Code

Surface water

Region boundary

Subregion boundary

Basin boundary

Subbasin boundary

Watershed boundary

Watershed code

Subwatershed code

The Regional and Subregional boundaries

serve as Basin boundaries as well as

Subbasin boundaries.

County Seat Municipalities

Subwatershed boundary

01

00

10 0 10 20 30 40 MILES

10 0 10 20 30 40 50 KILOMETERS

Base from U.S. Geological Survey digital data, 1983

USGS National Hydrography Data Set 1:100,000

Mississippi Transverse Mercator projection

http://www.maris.state.ms.us/htm/definitions/mstm.htm

(accessed February 1, 2008)

Hydrology, city (county seat was created from all of the MARIS City data), county, and state boundaries by MARIS

Interstate data by Bureau of Transportation Statistics (BTS)

Scale 1:500,000

1 inch is approximately equal to 8 miles

U.S. DEPARTMENT OF THE INTERIOR

U.S. GEOLOGICAL SURVEY Wilson, K.V., Jr., Clair, M.G. II, Turnipseed, D.P., Rebich, R.A.,

Watershed boundary dataset for Mississippi:

U.S. Geological Survey Scientific Investigations Map 3020: Scale 1:500,000

SCIENTIFIC INVESTIGATIONS MAP 3020

Watershed Boundary Dataset for Mississippi

By K. Van Wilson, Jr., Michael G. Clair II, D. Phil Turnipseed, and Richard A. Rebich

T E N N E S S E E

A R K A N S A S

A L A B A M A 

L O U I S I A N A 

Arkabutla

Lake

Horn

Lake

Moon

Lake

Sardis Lake

Bay Springs

Lake

Pickwick

Lake

Enid Lake

Grenada Lake

Ross R. Barnett Reservoir

Pearl

River

Bogue

Tangipahoa

Chitto

River

West

East

Fork

Fork

Amite

Amite

River

River

Pearl

River

Wolf

River

River

Biloxi

Red

Black

Leaf

River

Leaf

Chunky

Chunky

Okatibbee

R.

Creek

Sucarnoochee

Noxubee

River

Tombigbee

Tennessee

Tombigbee

Waterway

Buttahatchee

River

River

Creek

River

Strong

River

Bouie

Okatoma

Bouie

Creek

Creek

River

Homo

Bogue

River

River

River

Chickasawhay

River Creek

Chickasawhay

Buckatunna

Pascagoula

Escatawpa

Creek

Creek

Pearl

River

Yockanookany

River

Lake

Washington

Eagle

Lake

Lake

Mary

Buffalo

Homochitto

River

Bayou

Big

Pierre

Black

River

Yazoo

River

Yazoo

River

Yalobusha

River

Yalobusha

Skuna

Yocona

River

River

Canal

Canal

River

Tallahatchie

River

Yocona River

River

Hatchie

River

River

Tuscumbia

Canal

Little

Tallahatchie

Panola Quitman

Floodway

Coldwater

River

MISSISSIPPI

RIVER

MISSISSIPPI

RIVER

Big

Sunflower

River

Big

Sunflower

River

Bogue

Big

Black

River

River

Okatibbee

Lake

G U L F O F M E X I C O

Mississippi

Sound

St. Louis

Bay

Cat Island

Ship Island

Deer

Island

Horn

Island

Petit Bois

Island

Singing

River

Island

Biloxi

Bay

Pascagoula

Bay

Prepared in cooperation with the

MISSISSIPPI DEPARTMENT OF ENVIRONMENTAL QUALITY, U.S. DEPARTMENT OF AGRICULTURE - NATURAL RESOURCES CONSERVATION SERVICE

MISSISSIPPI DEPARTMENT OF TRANSPORTATION, U.S. DEPARTMENT OF AGRICULTURE - U.S. FOREST SERVICE, AND MISSISSIPPI AUTOMATED RESOURCE INFORMATION SYSTEM

Phalia

River