List of extreme points of U.S. states and territories

Extreme points are portions of a region which are further north, south, east, or west than any other. This is a list of extreme points in U.S. states, territories, and the District of Columbia.

Although many borders were initially defined by treaty or other agreement to be along a specific line of latitude or longitude, inaccuracies with surveying equipment/techniques caused the surveyed lines to deviate slightly from the true boundaries. Even as equipment/techniques improved, the initial surveyed line still remains the official border, which is why the extreme points may be either side of the agreed-upon line.

thumb|500px|The [[49th parallel north|49th parallel was agreed to be the border between the United States and British North America (later Canada) from Lake of the Woods to the Strait of Juan de Fuca in the Treaty of 1818 and Oregon Treaty. However, the true boundary line as surveyed deviates several seconds from the true parallel, as seen in this significantly exaggerated depiction]]

{| class="wikitable sortable"

! State / Territory !! Northernmost point !! Southernmost point !! Easternmost point !! Westernmost point

| Water: Tennessee border at the northwest corner of the state in Pickwick Lake northwest of Waterloo

Land: Tennessee border on an unnamed island in Pickwick Lake

| Sand Island (on which Sand Island Light sits)

| Georgia border on the Chattahoochee River southeast of Fort Mitchell

| Mississippi border southwest of Melvin

| Point Barrow northeast of Utqiaġvik

| Unnamed archipelago south of Amatignak Island in the Aleutian Islands

| By direction, water: British Columbia border on the Portland Canal east of Ketchikan

By direction, land: Camp Point, in the Misty Fjords National Monument Wilderness, east of Ketchikan

By longitude: Pochnoi Point on Semisopochnoi Island in the Aleutian Islands

| By direction: Peaked Island in the Aleutian Islands, west of Attu Island in the Aleutian Islands

By longitude: Amatignak Island in the Aleutian Islands

| Swains Island

Excluding disputed islands: Faumasili Point, Olosega Island

| Rose Atoll

| Swains Island

Excluding disputed islands: Luania Rocks, off Tutuila Island

| Utah border west of Oljato-Monument Valley

| Sonora border west of Nogales

| AZ-CO-NM-UT quadripoint

| Baja California border northwest of San Luis

| Missouri border northwest of Bella Vista

| AR-MS-LA tripoint

| Water: Tennessee border on the Mississippi River east of Armorel

Land: Barfield Bar, an island in the Mississippi River east of Armorel

| AR-MO-OK tripoint

| Oregon border northeast of Hornbrook

| Baja California border where it meets the Pacific Ocean in Border Field State Park

| Arizona border on the Colorado River southeast of Parker Dam

| Sugar Loaf Island

| Wyoming border north of Hahns Peak Village

| Southern border with New Mexico south of Chromo

| Kansas border east of Walsh

| Utah border southwest of Paradox

| Massachusetts border north of Salisbury

| Water: New York border in Long Island Sound south of Greenwich

Land: Great Captain Island

| Rhode Island border southeast of Sterling

| New York border northwest of Greenwich

| Pennsylvania border east of Beaver Valley

| Maryland border south of Williamsville

| On Fenwick Island

| Maryland border southwest of Newark

| Near the intersection of E Beach Dr NW and Verbena St NW

| Water: DC-MD-VA tripoint on the Potomac River

Land: Western end of Oxon Hill Farm

| Intersection of Eastern Avenue NE and Southern Avenue NE

| DC-MD-VA tripoint on the Potomac River at Little Falls

| Alabama border north of Malone

| Ballast Key in the Mule Keys

| Palm Beach Shores

| Alabama border on the Perdido River west of Walnut Hill

| Georgia

| North Carolina border near GA-NC-SC tripoint

| Florida border on the St. Marys River south of St. George

| Tybee Island

| AL-GA-TN tripoint

| Ritidian Point

| Cocos Island

| Pati point

| Point Udall

| Kure Atoll

| Ka Lae, Big Island

| Cape Kumukahi, Big Island

| Kure Atoll

| BC-ID-MT tripoint

| Utah border south of Oakley

| Wyoming border northeast of Soda Springs

| Oregon border on the Snake River northwest of Weiser

| IL-IA-WI tripoint on Mississippi River

| Missouri border on the Mississippi River off of Angelo Towhead, an island south of Cairo

| Water: IL-MI-WI tripoint in Lake Michigan

Land: Indiana border southeast of Russellville

| Missouri border on the Mississippi River west of Lima

| Water: Michigan border in Lake Michigan north of Burns Harbor

Land: Michigan border north of Granger

| Kentucky border on the Ohio River near the IL-IN-KY border

| Kentucky border on the Ohio River northeast of Patriot

| Illinois border on the Wabash River west of Mt. Vernon

| Minnesota border northeast of Lake Park

| Missouri border southwest of Keokuk

| Water: Illinois border on the Mississippi River east of Andover

Land: Unnamed island in the Mississippi River east of Andover

| South Dakota border on the Big Sioux River southwest of Westfield

| Nebraska border near the CO-KS-NE tripoint

| CO-KS-OK tripoint

| Missouri border on the Missouri River within Kansas City

| Colorado border near the CO-KS-NE tripoint

| Ohio border on the Ohio River north of Francisville

| Tennessee border in Kentucky Lake southeast of New Concord

| West Virginia border on the shore of the Tug Fork River near the KY-VA-WV tripoint

| Missouri border on the Mississippi River at the Madrid Bar in the Kentucky Bend

| Arkansas border northwest of Ida

| Unnamed island between Southwest Pass (a distributary of the Mississippi River) and West Bay, southwest of Port Eads

| Chandeleur Islands

| Texas border southwest of Vivian

| Quebec border on the St. Francis River at Estcourt Station

| Cedar Island Ledge, in the Isles of Shoals

| Sail Rock, off of West Quoddy Head

| ME-NH-QC tripoint

| Pennsylvania border northeast of Bowmans Addition

| Water: Virginia border in Chesapeake Bay southeast of Scotland

Land: Watkins Point, southwest of Crisfield

| Delaware border, where it meets the Atlantic Ocean

| West Virginia border southwest of Crellin

| New Hampshire border in Salisbury

| Nantucket Island

| Cape Cod National Seashore in Orleans

| New York border west of Mount Washington

| Water: Ontario border in Lake Superior north of Passage Island

Land: Gull Islands

| IN-MI-OH tripoint

| Water: Ontario border in Lake Huron northeast of Point Sanilac

Land: Shore of the St. Clair River in Port Huron

| Wisconsin border on the Montreal River where it meets Lake Superior

| MB-MN-ON tripoint in Lake of the Woods

| Iowa border south of Glenville

| Water: MI-MN-ON tripoint in Lake Superior

Land: Pigeon Point

| North Dakota border on the Red River of the North in St. Vincent

| Tennessee border north of Walnut

| Lighthouse Point, southeast of Ansley

| Alabama border on the Tennessee River northeast of Eastport

| Louisiana border on the Mississippi River northwest of Fort Adams

| Iowa border on the Des Moines River northeast of Anson

| Arkansas border southwest of Cardwell

| Kentucky border on the Mississippi River northeast of Wyatt

| Nebraska border on the Missouri River near the IA-MO-NE tripoint

| British Columbia border northeast of Eureka in Glacier National Park

| Idaho border at a sister of Italian Peak southwest of Lima

| South Dakota border near the MT-SD-WY tripoint

| Idaho border southwest of Heron

| South Dakota border near the NE-SD-WY tripoint

| Kansas border southeast of Rulo

| MO-KS-NE tripoint on the Missouri River

| Wyoming border southwest of Bushnell

| Idaho border northwest of Jackpot

| AZ-CA-NV tripoint on the Colorado River

| Utah border northeast of Montello

| California border northwest of Incline Village

| Quebec border near the ME-NH-QC tripoint

| Massachusetts border southeast of Pelham

| Anderson Ledge, in the Isles of Shoals

| Vermont border on the Connecticut River northwest of Hinsdale

| NJ-NY-PA tripoint on the Delaware River in Montague Township, Sussex County

| Broadway Beach in Cape May, Cape May County

| Water: New York border on the Hudson River in Alpine, Bergen County

Land: Station Rock, The Palisades in Alpine, Bergen County

| Delaware border in the former Killcohook National Wildlife Refuge in Pennsville Township, Salem County

| CO-NM-OK tripoint

| Sonora border near the Chihuahua-New Mexico-Sonora tripoint

| Oklahoma border northeast of Seneca

| AZ-NM-Sonora tripoint

| Ontario border on the St. Lawrence River north of Robert Moses State Park - Thousand Islands

| Ward's Point, Staten Island

| Montauk Point, Camp Hero State Park

| Water: Pennsylvania border in Lake Erie west of Dunkirk

Land: Pennsylvania border west of Mina

| NC-TN-VA tripoint

| Cape Fear, Bald Head Island

| Rodanthe Beach, Rodanthe

| GA-NC-TN tripoint

| Manitoba border northwest of Neche

| MN-ND-SD tripoint

| Minnesota border on the Bois de Sioux River northeast of Fairmount

| Montana border west of Fortuna

| Farallon de Pajaros

| Puntan Pona, Rota

| Farallon de Medinilla

| Farallon de Pajaros

| Water: OH-PA-ON tripoint in Lake Erie

Land: Pennsylvania border where it meets Lake Erie

| West Virginia border on the shore of the Ohio River in Burlington

| Pennsylvania border north of West Hill

| Indiana border west of Elizabethtown

| Kansas border north of Knowles

| Gunn Lake, on the Texas border near the AR-OK-TX tripoint

| Arkansas border on the Arkansas River east of Moffett

| New Mexico border southwest of Wheeless

| Washington border on the Columbia River north of Sand Island

| Nevada border south of Fields

| Idaho border on the Snake River east of Imnaha

| Northwest Rock, southwest of Cape Blanco

| Water: NY-ON-PA tripoint, in Lake Erie

Land: New York border where it meets Lake Erie

| Maryland border south of Hanover

| New York border on the Delaware River in Matamoras

| Water: OH-ON-PA tripoint in Lake Erie

Land: West Virginia border west of New Freeport

| Shacks Beach northwest of Jobos

| Isla Morillito

| Punta del Este, Isla Culebrita

| Isla Monito

| Massachusetts border northeast of Cumberland

| Black Rock Point, Block Island

| Massachusetts border where it meets Rhode Island Sound

| Water: CT-NY-RI tripoint in Block Island Sound

Land: Connecticut border on Sandy Point Island

| North Carolina border north of Tigerville

| Georgia border on the Savannah River southwest of Hilton Head Island

| North Carolina border where it meets the Atlantic Ocean on Bird Island

| Georgia border in Lake Yonah southwest of Long Creek

| North Dakota border northwest of Ludlow

| Nebraska border on the Missouri River south of Dakota Dunes

| Iowa border on the Big Sioux River southeast of Hudson

| MT-SD-WY tripoint

| Water: Kentucky border in Kentucky Lake northwest of Dover

Land: Land Between the Lakes National Recreation Area, northwest of Dover

| Georgia border west of Lookout Mountain

| Virginia border northeast of the NC-TN-VA tripoint

| Arkansas border southwest of Memphis (west of the Mississippi River)

| NM-OK-TX tripoint

| Tamaulipas border on the Rio Grande River south of South Point

| Louisiana border on the coast of the Sabine River northeast of Burkeville

| New Mexico border west of Prado Verde

| United States Minor Outlying Islands

| Sand Island, Midway Atoll

| Jarvis Island

| Navassa Island

Excluding disputed islands: Jarvis Island

| Wilkes Island, Wake Island

Excluding disputed islands: Sand Island, Midway Atoll

| ID-UT-WY tripoint

| Arizona border west of Oljato-Monument Valley