Tri-State Areas - World Population Review

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Our Methodology View all articles Geography > Travel > Tri-State Areas United States Tri-State Areas

State	Population↓
	California	39,896,400
	Texas	32,416,700
	Florida	24,306,900
	New York	20,127,000
	Pennsylvania	13,200,800
	Illinois	12,846,000
	Ohio	12,001,800
	Georgia	11,413,800
	North Carolina	11,375,700
	Michigan	10,254,700
	New Jersey	9,743,270
	Virginia	8,964,220
	Washington	8,159,900
	Arizona	7,801,100
	Tennessee	7,386,640
	Massachusetts	7,275,380
	Indiana	7,012,560
	Maryland	6,355,540
	Missouri	6,320,320
	Colorado	6,069,800
	Wisconsin	6,022,120
	Minnesota	5,873,360
	South Carolina	5,660,830
	Alabama	5,237,750
	Kentucky	4,663,930
	Louisiana	4,617,080
	Oregon	4,309,810
	Oklahoma	4,158,420
	Connecticut	3,739,160
	Utah	3,624,400
	Nevada	3,373,680
	Iowa	3,287,640
	Arkansas	3,126,140
	Kansas	3,008,820
	Mississippi	2,942,790
	New Mexico	2,148,440
	Idaho	2,062,610
	Nebraska	2,040,670
	West Virginia	1,768,950
	Hawaii	1,455,660
	New Hampshire	1,422,700
	Maine	1,415,740
	Montana	1,149,100
	Rhode Island	1,130,070
	Delaware	1,082,900
	South Dakota	937,397
	North Dakota	811,610
	Alaska	747,379
	District of Columbia	732,102
	Vermont	648,063
	Wyoming	592,720

Tri-state area is an informal term in the eastern United States for any of the regions associated with a particular metropolis that lies across the three states. Some tri-state areas involve a state boundary tripoint. The most common tri-state area is the greater New York City area, made up of New York, New Jersey, and Connecticut. Of the 62 points in the United States where three states meet, 35 are on land and 27 are in the water.

Examples of these tri-state areas include:

The Philadelphia metropolitan area, covering parts of Pennsylvania, New Jersey, and Delaware
The Greater Boston area covering parts of Massachusetts, Rhode Island, and New Hampshire
The Pittsburgh area covering Pennsylvania, Ohio, and West Virginia
The Minisink Valley region covering Orange County, New York; Sussex County, New Jersey; and Pike County, Pennsylvania
The Cincinnati metro area including Ohio, Kentucky, and Indiana
The Chicago tri-state area (Chicagoland) covering Illinois, Indiana, and Wisconsin
The Greater Memphis area (Mid-South) including Tennessee, Mississippi, and Arkansas
The Dubuque, Iowa area includes Illinois and Wisconsin
The La Crosse, Wisconsin area also includes La Crescent, Hokah, and Brownsville in Minnesota and New Albin and Lansing in Iowa.
The Chattanooga tri-state area includes parts of Tennessee, Alabama, and Georgia
The District of Columbia area is known as the D.M.V. - D.C., Maryland, and Virginia (even though the District of Columbia is not a state)
The Joplin District is a region of Oklahoma, Kansas, and Missouri known for mining lead and zinc
The Winegrass Region includes parts of Alabama, Georgia, and Florida
The Sioux City metro area covers parts of Iowa, Nebraska, and South Dakota
Litchfield County, Connecticut; Berkshire County, Massachusetts; and eastern Dutchess County, New York are referred to as the “tri-state area” or the “tri-corners”
The Quincy, Illinois tri-state area includes Missouri and Iowa
The Illinois-Indiana-Kentucky tri-state area around Evansville, Indiana
The Huntington-Ashland metropolitan area includes towns in Kentucky, Ohio, and West Virginia.

Some tri-state areas can be met on water. Examples of these include:

Delaware, New Jersey, and Pennsylvania meet at the Delaware River in the Philadelphia metro area.
Illinois, Indiana, and Michigan, which converge at Lake Michigan. This is also known as the Indiana Dunes or the Michigan Dunes area.
Alabama, Mississippi, and Tennessee meet at the Tennessee River
Connecticut, New York, and Rhode Island meet at the Long Island Sound
Illinois, Indiana, and Kentucky meet at two points: the Wabash River and the Ohio River
Illinois, Kentucky, and Missouri meet at two points: the Mississippi River and Ohio River
Maryland, Virginia, and West Virginia at the Potomac River
Ohio, Pennsylvania, and West Virginia at the Ohio River
Michigan, Minnesota, and Wisconsin at Lake Superior

In addition to tri-state areas with tri-points, some regions of three states that are “tri-state areas” do not have a single meeting point. These are:

The Gulf Coast Region: Alabama, Florida, and Mississippi
The New York metropolitan area: Connecticut, New Jersey, and New York
The Wilmington, Delaware metro area: Delaware, Maryland, and New Jersey
Delmarva Peninsula: Delaware, Maryland, and Virginia
The Spokane, Washington area (connected by Interstate 90): Idaho, Montana, Washington
Chicago metro area; Illinois, Montana, Washington
The Liberal, Kansas area: Kansas, Oklahoma, Texas
Erie metro area, also called the Niagara Frontier and North Coast: New York, Pennsylvania, Ohio
The metro areas of Spartanburg, South Carolina; Asheville, North Carolina; and Johnson City and Kingsport Tennessee are connected along Interstate 26.
Northern New England: Vermont, New Hampshire, and Maine
West Virginia, Virginia, and North Carolina are connected at an intersection of Interstate 77, connecting Charleston, West Virginia; Charlotte, North Carolina; and Wytheville Virginia.