Cincinnati metropolitan area
Cincinnati metropolitan area
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Cincinnati metropolitan area

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Cincinnati metropolitan area

The Cincinnati metropolitan area (also known as the Cincinnati Tri-State area or Greater Cincinnati) is a metropolitan area with its core in Ohio and Kentucky. Its largest city is Cincinnati and includes surrounding counties in the U.S. states of Ohio, Kentucky, and Indiana.

The United States Census Bureau's formal name for the area is the Cincinnati, OH–KY–IN Metropolitan Statistical Area. As of the 2020 U.S. census, the metro area had a population of 2,256,884, making Greater Cincinnati the 30th-most populous metropolitan area in the United States, and the largest metro area in Ohio, followed by Columbus and Cleveland. The Cincinnati–Wilmington, OH–KY–IN Combined Statistical Area, adds Clinton County, Ohio (defined as the Wilmington, OH micropolitan area) and, until 2023, Mason County, Kentucky (defined as the Maysville, KY micropolitan area), was part of the CSA. The Cincinnati metropolitan area is considered part of the Great Lakes Megalopolis.

The Cincinnati metropolitan area was originally designated by the United States Census Bureau in 1950 and consisted of the Kentucky counties of Campbell and Kenton and the Ohio county of Hamilton. As surrounding counties saw an increase in their population densities and the number of their residents employed within Hamilton County, they met census criteria to be added to the MSA. The Hamilton–Middletown, OH MSA was also formed in 1950 and consisted solely of Butler County, Ohio.

In 1990, the census changed designation of the areas known as MSAs to Primary Metropolitan Statistical Area (PMSA), and a new Consolidated Metropolitan Statistical Area (CMSA) grouping was created. From 1990 through 2005, the Cincinnati–Hamilton–Middletown CMSA included the Cincinnati–Hamilton, OH–KY–IN PMSA and the Hamilton–Middletown, OH PMSA.

As of December 2005, census terminology changed again, eliminating the PMSA/CMSA terminology. Consolidated Statistical Areas (CSA) combine more than one Core Based Statistical Area (CBSA). Newly defined MSAs (Metropolitan) and μSAs (Micropolitan) Statistical Areas are CBSAs. From 2005 to 2013, the Cincinnati–Middletown–Wilmington CSA included the Cincinnati–Middletown MSA (defined as the old Cincinnati–Hamilton–Middletown CMSA), and Wilmington, OH μSA (Clinton County, Ohio).

In 2013, the CSA was redefined again. The Cincinnati–Middletown MSA was renamed the Cincinnati MSA. The Wilmington, OH μSA remained in the CSA. The Maysville, KY μSA, which had previously consisted of Mason and Lewis Counties in Kentucky, was redefined as consisting solely of Mason County and added to the CSA. The name of the CSA accordingly changed to the Cincinnati–Wilmington–Maysville CSA.

In September 2018, Union County, Indiana, was added to the Cincinnati MSA.

In July 2023, the new metropolitan area delineation were published and Union County, Indiana, was detached from the Cincinnati MSA, and the Maysville, Kentucky, micropolitan statistical area was detached from the combined statistical area.

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