List of tripoints of U.S. states

This is a list of all tripoints in which the boundaries of three U.S. states converge at a single geographic point. Of the 60 such points, 36 are on dry land and 24 are in water. Of the points in water, 3 are in the Great Lakes and thus have no land nearby. A tripoint occurring in a populated area may also be informally described as a tri-state area.

Land

State 1	State 2	State 3	Coordinates	Notes
Alabama	Florida	Georgia		Marker on Chattahoochee riverbank is actually a few feet above and west of true tripoint at high-water line.
Alabama	Georgia	Tennessee		Tri-State Corner. Marker on dry land at surface level and unmarked on lake in cavern directly below. Stolen in 2009 and returned two years later.
Arizona	Nevada	Utah		Marked with a red sandstone monument.
Arkansas	Louisiana	Mississippi		Probably unmarked on silt island in river sometimes connected to west bank by mud flat accreted by riprap.
Arkansas	Louisiana	Texas		See Ark-La-Tex. Marker in process of being surrounded and absorbed by tree.
Arkansas	Missouri	Oklahoma		Marked with a stone monument.
Arkansas	Oklahoma	Texas		Unmarked on seasonal silt island or in river bed, but Oklahoma–Texas state line as revised in 2000 is defective in not extending from vegetation line on south bank to pre-established tripoint.
California	Nevada	Oregon		Marked with a cairn.
Colorado	Kansas	Nebraska		Marked with a brass disc.
Colorado	Kansas	Oklahoma		8 Mile Corner. Marker is concealed in crypt beneath removable manhole cover.
Colorado	Nebraska	Wyoming		Marked with a stone surrounded by a three-stone colored base.
Colorado	New Mexico	Oklahoma		Preston Monument
Colorado	Utah	Wyoming		Marked.
Connecticut	Massachusetts	New York		See Brace Mountain or Mount Frissell. Marked with a stone inscribed with MASS-1898-NY and a scratched-on CONN.
Connecticut	Massachusetts	Rhode Island		See Thompson, Connecticut. Marked with a stone inscribed with MASS-CONN-RI.
Delaware	Maryland	Pennsylvania		Marked by the Tri-State Monument, inscribed with M-M-P-P. See Delaware Wedge.
Georgia	North Carolina	Tennessee		Marked.
Idaho	Montana	Wyoming		Located within Yellowstone National Park. Marked, although difficult to access.
Idaho	Nevada	Oregon		Marked with a three-sided stone inscribed with N-I-O on the respective faces.
Idaho	Nevada	Utah		Marked with a granite monument inscribed with the respective states' names.
Idaho	Utah	Wyoming		Marked with a stone.
Indiana	Michigan	Ohio		Brass marker with the shapes of the three states is located in a monument box beneath the surface of a rural road. Was set in 1999 and is referenced by a granite marker 20 feet to the east on the Michigan-Ohio line.
Iowa	Minnesota	South Dakota		True point is marked with a disc in the center of a T-shaped road intersection. A witness monument nearby in the South Dakota corner acknowledges the tri-point being set in 1859.
Kansas	Missouri	Oklahoma		Marked with a plaque on a seldom used dead-end road.
Kentucky	Tennessee	Virginia		Tri-State Peak Located within Cumberland Gap National Historical Park. Marked.
Kentucky	Virginia	West Virginia		Marked with a USCG marker on top of a two-foot high iron pipe at the river's high point.
Maryland	Pennsylvania	West Virginia		Marked with a pyramid-like stone.
Massachusetts	New Hampshire	Vermont		Marker is technically on dry land, but buried within river bed due to a dam's construction downstream.
Massachusetts	New York	Vermont		Marked with a stone.
Minnesota	North Dakota	South Dakota		Near the Bois de Sioux River
Montana	North Dakota	South Dakota		Marked with a red granite stone.
Montana	South Dakota	Wyoming		Marked with a stone within a fence.
Nebraska	South Dakota	Wyoming		Marked with a stone within a fence.
New Jersey	New York	Pennsylvania		Marked by the Tri-States Monument in Port Jervis, New York, at the confluence of the Delaware and Neversink rivers.
New Mexico	Oklahoma	Texas		Texhomex Marker
North Carolina	Tennessee	Virginia		North Carolina–Tennessee–Virginia Corners - Marked.

Water

State 1	State 2	State 3	Coordinates	Water	Notes
Alabama	Mississippi	Tennessee		Tennessee River
Arizona	California	Nevada		Colorado River
Arkansas	Mississippi	Tennessee		Mississippi River	Memphis, Tennessee metro area.
Arkansas	Missouri	Tennessee		Mississippi River
Connecticut	New York	Rhode Island		Long Island Sound	The part of New York that is in this tri-state area is Fishers Island. It is the New London, Connecticut metro area.
Delaware	New Jersey	Pennsylvania		Delaware River	Philadelphia metro area, at the east end of the Twelve-Mile Circle.
Georgia	North Carolina	South Carolina		Chatooga River	Located in river very near marker on dry land.
Idaho	Oregon	Washington		Snake River
Illinois	Indiana	Kentucky		Wabash River and Ohio River	Evansville, Indiana metro area. See Illinois–Indiana–Kentucky tri-state area.
Illinois	Indiana	Michigan		Lake Michigan	Known as either the Indiana Dunes or the Michigan Dunes Area
Illinois	Iowa	Wisconsin		Mississippi River	Dubuque, Iowa metro area.
Illinois	Kentucky	Missouri		Mississippi River and Ohio River	Little Egypt region popularly labeled as a tri-state area with St. Louis, Missouri, Carbondale, Illinois metro area and Paducah, Kentucky being its nuclei.
Illinois	Michigan	Wisconsin		Lake Michigan
Indiana	Kentucky	Ohio		Ohio River	Cincinnati metro area. The tripoint is near, but not precisely at, the confluence with the Great Miami River.
Iowa	Illinois	Missouri		Mississippi River and Des Moines River	Border with Lee County, Iowa
Iowa	Minnesota	Wisconsin		Mississippi River	La Crosse, Wisconsin metro area. Was apparently marked at one time with a sign that had been anchored in the location, but that sign has since been moved as of 2001.
Iowa	Missouri	Nebraska		Missouri River
Iowa	Nebraska	South Dakota		Big Sioux River and Missouri River	Sioux City, Iowa metro area.
Kansas	Missouri	Nebraska		Missouri River
Kentucky	Missouri	Tennessee		Mississippi River	Three separate tripoints, due to meanders of the river. See also Kentucky Bend.
Kentucky	Ohio	West Virginia		Big Sandy River and Ohio River	Huntington (W.V.)-Ashland (Ky.)-Ironton (Oh.) Tri-State region.
Maryland	Virginia	West Virginia		Potomac River	Unmarked, at high water mark, because the Maryland West Virginia state line is at the high water mark even tho the Maryland Virginia state line runs generally along the low water line, so perhaps misclassified here because it is rarely actually under water.
Michigan	Minnesota	Wisconsin		Lake Superior
Ohio	Pennsylvania	West Virginia		Ohio River	Technically the Beginning Point of the U.S. Public Land Survey, although the actual monument is 1,112 feet north of the tripoint due to the tripoint's current location under water; Pittsburgh Tri-State.