Several cities have been called “Twin Cities.” Columbus (GA), Phenix City (AL) and Girard (AL) were called ‘Triple Cities” by at least the 1890s.
 
The western New York cities of Binghamton, Johnson City and Endicott are known as the “Triple Cities.” A baseball team in the New York-Pennsylvania League was formed in 1923 and was called the “Triplets.” The name “Triple Cities” was cited in a Pennsylvania newspaper on April 15, 1923:
 
“Binghamton’s franchise in the New York-Pennsylvania State Baseball League was taken over yesterday by Endicott-Johnson workers of Binghamton, Johnson City and Endicott and will represent the ‘Triple Cities,’ in the new circuit.”
 
     
Wikipedia: Binghamton, New York metropolitan area
The Binghamton Metropolitan Statistical Area, also called Greater Binghamton or the Triple Cities, is a region of southern upstate New York in the Northeastern United States, anchored by the city of Binghamton. The MSA encompasses Broome and Tioga counties, which together had a population of 251,725 as of the 2010 census. From 1963 to 1983, the MSA also included neighboring Susquehanna County in Pennsylvania, part of which still falls in the Binghamton, NY–PA Urban Area.[4] In addition to these three counties, the greater region includes parts of Delaware and Chenango counties in New York; portions of Cortland and Otsego counties in New York and Wayne County, Pennsylvania are sometimes considered part of the region as well. Using the definition of a 30-mile radius from Binghamton, the population as of the 2010 census is 317,331.
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Triple Cities
Historically, the region has been known as the Triple Cities and is made up of Binghamton, Johnson City, and Endicott, New York, the latter two of which are technically villages.
 
The area is also sometimes called the “Greater Binghamton Area” as the city of Binghamton is the largest and most prominent of the three, with a population greater than the other two combined, and a much larger geographical area.
 
Wikipedia: Binghamton, New York
Binghamton /ˈbɪŋəmtən/ is a city in, and the county seat of, Broome County, New York, United States. It lies in the state’s Southern Tier region near the Pennsylvania border, in a bowl-shaped valley at the confluence of the Susquehanna and Chenango Rivers. Binghamton is the principal city and cultural center of the Binghamton metropolitan area (also known as Greater Binghamton, or historically the Triple Cities), home to a quarter million people. The population of the city itself, according to the 2010 census, is 47,376.
 
Wikipedia: Johnson City, New York
Johnson City is a village in Broome County, New York, United States. The population was 15,174 at the 2010 census. It is part of the Binghamton Metropolitan Statistical Area.
 
The village of Johnson City is in the town of Union, New York, and is a part of the “Triple Cities” along with Endicott and Binghamton. Johnson City lies to the west of Binghamton on the eastern side of the town of Union.
 
Wikipedia: Endicott, New York
Endicott is a village in Broome County, New York, United States. The population was 13,392 at the 2010 census. It is part of the Binghamton Metropolitan Statistical Area. The village is named after Henry B. Endicott, a founding member of the Endicott Johnson Corporation shoe manufacturing company, who founded the community as the “Home of the Square Deal”.
     
Baseball-Reference.com
Binghamton Triplets
Location: Binghamton, NY
League: New York-Penn League 1923-1937; Eastern League 1938-1963; New York-Penn League 1964-1966; Eastern League 1967-1968
Affiliation: New York Yankees 1932-1961; Kansas City A’s 1962-1963; Milwaukee Braves 1964; New York Yankees 1965-1968
Ballpark: Johnson Field Johnson City, NY
 
16 July 1899, The Sunday Herald (Columbus, GA), pg. 5, col. 3 ad:
This means the greatest slaughtering in Dry Goods, Shoes, Slippers, Millinery, etc., the people of the Triple Cities have ever had an opportunity of witnessing.
(Logan & Ashley.—ed.)
   
9 April 1923, Binghamton (NY) Press, “George F. Receives Big ‘Welcome Home,’” pg. 11, col. 2:
While we of the Triple Cities submitted quietly to your taking a well-earned rest, ...
 
16 April 1923, Bradford (PA) Era, pg. 1, col. 6:
BINGHAMTON FRANCHISE
FOR ENDICOTT-JOHNSON
Binghamton, N. Y., April 15.—Binghamton’s franchise in the New York-Pennsylvania State Baseball League was taken over yesterday by Endicott-Johnson workers of Binghamton, Johnson City and Endicott and will represent the “Triple Cities,” in the new circuit.
 
12 May 1923, The Billboard, pg. 107, col. 2 ad:
The triple cities, BINGHAMTON, JOHNSON CITY and ENDICOTT, will spend $10,000 to give the “folks living in the Valley of Opportunity” the biggest July 4th possible.
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H. M. ADDISON, Manager Stone Opera House.
Chairman Triple City July Fourth Celebration, Binghamton, N. Y.
 
NYS Historic Newspapers
22 June 1923, Endicott (NY) Bulletin, pg. 6, col. 4:
MAYORS IN RADIUS OF
100 MILES ARE INVITED
Invitations to the mayors of cities and presidents of villages within a radius of 100 miles to Binghamton to attend the Triple Cities celebration of Independence Day to be held by Endicott, Binghamton and Johnson City have been sent out by Fancher M. Hopkins, chairman of the invitation committee.
 
OCLC WorldCat record
A pocket guide to fifty of the plants and trees of the Triple Cities : giving exact location of specimens in Dayton, Daytona Beach and Seabreeze
Author: Nellie Irene Stevenson
Publisher: Daytona, Fla. : Mills Print. Concern, ©1925.
Edition/Format:   Print book : English
 
2 November 1930, Trenton (NJ) Sunday Times-Advertiser, pt. 4, pg. 1, col. 3:
Triple Cities Withdraws
From N. Y.-Penna. League
(United Press)
BINGHAMTON, N. Y., Nov. 1.—The American Legion Post of Binghamton, Johnson City, and Endicott, operators of the Triple Cities baseball team, voted today to withdraw from the New York-Pennsylvania League.
   
Google Books
A Study of All American Markets. (1931-32)
Including All Cities and Towns of 1,000 Population Or More and All Counties in the United States, Arranged by Markets and States
By Leslie M. Barton
Chicago, IL: Major market newspapers, Incorporated
1931
Pg. 36:
In its home zone (Binghamton, Endicott and Johnson City), known as The Triple Cities area, there are 24,186 homes.
 
OCLC WorldCat record
Concert & dance : benefit, Triple Cities Traction Symphonic Band, Triple Cities Traction Dance Orchestra : Kalurah Temple, Wednesday eve., January 16, 1935.
Author: Triple Cities Traction Corporation (Binghamton, N.Y.)
Publisher: [Binghamton, N.Y.] : [Triple Cities Traction Corporation], [[1935]
Edition/Format:   Print book : English
 
OCLC WorldCat record
The gimac.
Author: Triple Cities Conjuror’s Club.
Publisher: Binghamton, Johnson City and Endicott, N.Y. : Triple Cities Conjuror’s Club, 1939-
Edition/Format:   Journal, magazine : Periodical : English
 
OCLC WorldCat record
Triple Cities rural directory, 1941 : a directory of the rural routes and sections surrounding Binghamton, Johnson City, Endicott, Union, Vestal, Conklin and Kirkwood, N.Y.
Author: Hogan Directory Company.
Publisher: Binghamton, N.Y. : Hogan Directory Co., ©1941.
Edition/Format:   Print book : English
 
OCLC WorldCat record
Map of the Triple Cities : [Binghamton, Johnson City, and Endicott, Broome County, New York].
Author: William Peres Munger
Publisher: Binghamton : Friendly Finance Service, 1948.
Edition/Format:   Map : English
     
Cyburbia
Thread: All of the different Twin Cities    
jsk1983
17 Apr 2005, 4:09 PM
The area where I’m attending school is known as “the Triple Cities”. It is comprised of Binghamton, Johnson City, and Endicott. Binghamton is the only city out of the three. It has a population of around 46,000. Johnson City, despite its name is actually a village, it has a population of around 15,000. Endicott, also a village, has a population of around 12,800. All three “cities” have an industrial past. The area was once the home of the Endicott Johnson Shoe company which was once a major employer in the area. They did alot for the community but have since departed to some place where labor is cheaper. Endicott was once home to IBM, but they too have departed and left behind a great deal of pollution.
 
Just north of Buffalo the cities of Tonawanda and North Tonawanda are occasionally reffered to as the twin cities. There is a twin city highway and I believe there may be a twin cities hospital. Outside of these official names it doesn’t seem like you hear the cities being reffered to as “twin cities” very often. More likely a local will refer to them as the Tonawandas, which can also include the suburban town of Tonawanda.
 
drucee
17 Apr 2005, 11:40 PM
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At least two metropolitan areas are known as “Tri-Cities”: Bristol-Kingsport-Johnson City, TN-VA, and Richland-Pasco-Kennewick, WA.
   
City Dictionary
Triple Cities
Binghamton, Endicott, and Johnson City are the “Triple Cities”. Endicott and Johnson City are actually villages, however.
 
The region is collectively referred to as Greater Binghamton.
Posted by: onlooker (YouNews) on Dec 03, 2009
 
Google Books
Baseball Team Names:
A Worldwide Dictionary, 1869-2011
By Richard Worth
Jefferson, NC: McFarland & Company, Inc.
2013
Pg. 37:
Binghamton, New York
Triplets 1923-27 New York-Pennsylvania (B); 1938-63 Eastern (A); 1964-66 New York-Pennsylvania (A); 1967-68 Eastern (AA). These teams represented the “Tri-Cities” of Binghamton (NY), Endicott (NY) and Johnson City (NY). Home games were played in Binghamton.