Cincinnati metropolitan area

Greater Cincinnati
Cincinnati, OH–KY–IN Metropolitan Statistical Area
Downtown Cincinnati along the Ohio River, viewed from Devou Park in Covington, Kentucky.
Map
Cincinnati–Wilmington, OH–KY–IN CSA
Country United States
State Ohio
Kentucky
Indiana
Largest city Cincinnati
Counties
Area
 • Total4,808 sq mi (12,450 km2)
Elevation551 ft (168 m)
Population
(2015)
 • Metro density445/sq mi (172/km2)
 • MSA2,256,884 (28th)
 MSA/CSA = 2015, Urban = 2013
GDP
 • MSA$186.1 billion (2022)
Time zoneUTC−5 (EST)
 • Summer (DST)UTC−4 (EDT)
Area code(s)513, 283, 859, 937, 812

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 28th-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.

Census designation history

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.

Most of the region's population growth has occurred in the northern counties, leading to speculation that the Cincinnati–Northern Kentucky metropolitan area will eventually merge with Greater Dayton. Cincinnati is also located very close to other metropolitan areas, such as Columbus, Indianapolis, Lexington, and Louisville.

Population

Historical population
CensusPop.Note
19501,244,738
19601,544,65924.1%
19701,690,2349.4%
19801,753,8013.8%
19901,844,9175.2%
20002,009,6328.9%
20102,130,1516.0%
20202,256,8845.9%
data source:
Statistical Area/County 2020 Census 2010 Census 2000 Census 1990 Census 1980 Census 1970 Census 1960 Census 1950 Census
Cincinnati–Wilmington–Maysville, OH-KY-IN CSA 2,316,022 2,172,191 2,050,175 1,880,332 1,788,404 1,721,698 1,574,663 1,270,310
Cincinnati, OH-KY-IN MSA 2,256,884 2,130,151 2,009,632 1,844,917 1,753,801 1,690,234 1,544,659 1,244,738
Hamilton County, Ohio 830,639 802,374 845,303 866,228 873,224 924,018 864,121 723,952
Butler County, Ohio2 390,357 368,130 332,807 291,479 258,787 226,207 199,076 147,203
Warren County, Ohio 242,337 212,693 158,383 113,909 99,276 84,925 65,711 38,505
Clermont County, Ohio 208,601 197,363 177,977 150,187 128,483 95,725 80,530 42,182
Brown County, Ohio 43,676 44,846 42,285 34,966 31,920 26,635 25,178 22,221
Clinton County, Ohio 42,018
Boone County, Kentucky 135,968 118,811 85,991 57,589 45,842 32,812 21,940 13,015
Kenton County, Kentucky 169,064 159,720 151,464 142,031 137,058 129,440 120,700 104,254
Campbell County, Kentucky 93,076 90,336 88,616 83,866 83,317 88,501 86,803 76,196
Grant County, Kentucky 24,941 24,662 22,384 15,737 13,308 9,999 9,489 9,809
Pendleton County, Kentucky 14,644 14,877 14,390 12,036 10,989 9,949 9,968 9,610
Bracken County, Kentucky 8,400 8,488 8,279 7,766 7,738 7,227 7,422 8,424
Gallatin County, Kentucky 8,690 8,589 7,870 5,393 4,842 4,134 3,867 3,969
Mason County, Kentucky 17,120
Dearborn County, Indiana 50,679 50,047 46,109 38,835 34,291 29,430 28,674 25,141
Franklin County, Indiana 22,785 23,087 22,151 19,580 19,612 16,943 17,015 16,034
Ohio County, Indiana 5,940 6,128 5,623 5,315 5,114 4,289 4,165 4,223
Union County, Indiana 7,087

Notes
1For comparison purposes, population data is summarized using 2008 Census CSA/MSA county definitions.
2Butler County, Ohio was previously known as the Hamilton–Middletown, OH PMSA and was separate from the Cincinnati, OH–KY–IN PMSA until the 1990 Census, when the Cincinnati–Hamilton, OH–KY–IN CMSA designation was used to consolidate the two PMSAs. The CMSA/PMSA designation is no longer used by the US Census.

Main cities

Hamilton, Ohio is the second-largest city in the Greater Cincinnati area.
Covington is the largest city in Northern Kentucky.

Population figures as of the 2020 census.

Municipalities with more than 100,000 inhabitants

Municipalities with 50,000 to 99,999 inhabitants

Municipalities with 10,000 to 49,999 inhabitants

Climate

A NASA image of the Cincinnati metropolitan area. The Ohio River separates the states of Ohio and Kentucky.

The Cincinnati–Northern Kentucky metropolitan area is located within a climatic transition zone. The southern area of the region, from roughly about the Ohio River, is at the extreme northern limit of the humid subtropical climate; the north part of the region is on the extreme southern cusp of the humid continental climate. Evidence of both humid subtropical climate and humid continental climate can be found here, particularly noticeable by the presence of plants indicative of each climatic region. Within the area, the USDA climate zone rating can vary from as warm as zone 6b to as cool as zone 5b, with the warmest areas tending to be found closest to the Ohio River; individual microclimates of even cooler and warmer temperature may occur in the area but are too small to be considered in the overall climate zone rating. The common wall lizard, introduced from Italy in the 1950s, is an example of fauna in the area that lends a subtropical ambiance to the urban core (near downtown Cincinnati) area of the region.

Significant moderating variables for the overall climate are:

  • South and central: Ohio River, Licking River, relatively large hills and valleys, and a combined urban heat island effect due to the close proximity of the Cincinnati-Northern Kentucky cities of Covington, Newport, and Downtown Cincinnati
  • Suburban: large parking lots that take up much land in Mason, West Chester, and Florence create a heat island effect.
  • North: Great Miami River, the area is situated on a glaciated flat plateau, the Miami Valley, and some urban heat island effect in the immediate area of downtown Dayton and Hamilton.

Traveling through the region from North to South, a subtle but interesting change in climate can be observed and is most evidenced by the gradual increase in the occurrence of subtropical indicator plants in the landscape. Most noticeable are the Southern Magnolia and Mimosa trees, and the needle palm also may be found as a winter hardy landscape specimen in lawns near the Ohio River. During the winter, travellers from north to south will routinely observe a significant difference in snowfall/ice/rain in the region.

Although widely accepted as part of the Midwestern United States, the Cincinnati–Northern Kentucky metropolitan area is climatically and geographically located on the northern periphery of the Upland South region of the United States and is within the Bluegrass region of Ohio and Kentucky.

The area is vulnerable to occasional severe weather—thunderstorms, large hail and sometimes tornadoes.

Climate data for Cincinnati (Cincinnati/Northern Kentucky Int'l), 1991–2020 normals, extremes 1871–present
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 77
(25)
79
(26)
88
(31)
90
(32)
95
(35)
102
(39)
108
(42)
103
(39)
102
(39)
95
(35)
82
(28)
75
(24)
108
(42)
Mean maximum °F (°C) 61.8
(16.6)
66.1
(18.9)
74.3
(23.5)
81.1
(27.3)
86.7
(30.4)
91.6
(33.1)
93.6
(34.2)
93.2
(34.0)
90.7
(32.6)
82.9
(28.3)
72.0
(22.2)
63.8
(17.7)
95.3
(35.2)
Mean daily maximum °F (°C) 39.6
(4.2)
43.7
(6.5)
53.5
(11.9)
65.5
(18.6)
74.5
(23.6)
82.6
(28.1)
86.0
(30.0)
85.2
(29.6)
78.9
(26.1)
66.7
(19.3)
53.8
(12.1)
43.3
(6.3)
64.4
(18.0)
Daily mean °F (°C) 31.4
(−0.3)
34.7
(1.5)
43.6
(6.4)
54.6
(12.6)
64.1
(17.8)
72.3
(22.4)
75.9
(24.4)
74.9
(23.8)
68.1
(20.1)
56.2
(13.4)
44.4
(6.9)
35.6
(2.0)
54.7
(12.6)
Mean daily minimum °F (°C) 23.1
(−4.9)
25.8
(−3.4)
33.8
(1.0)
43.7
(6.5)
53.7
(12.1)
62.1
(16.7)
65.9
(18.8)
64.6
(18.1)
57.3
(14.1)
45.7
(7.6)
35.1
(1.7)
27.9
(−2.3)
44.9
(7.2)
Mean minimum °F (°C) 0.1
(−17.7)
6.5
(−14.2)
14.8
(−9.6)
26.7
(−2.9)
36.6
(2.6)
49.2
(9.6)
55.9
(13.3)
54.6
(12.6)
42.5
(5.8)
29.8
(−1.2)
19.0
(−7.2)
9.1
(−12.7)
−2.7
(−19.3)
Record low °F (°C) −25
(−32)
−17
(−27)
−11
(−24)
15
(−9)
27
(−3)
39
(4)
47
(8)
43
(6)
31
(−1)
16
(−9)
0
(−18)
−20
(−29)
−25
(−32)
Average precipitation inches (mm) 3.30
(84)
3.17
(81)
4.16
(106)
4.53
(115)
4.67
(119)
4.75
(121)
3.83
(97)
3.43
(87)
3.11
(79)
3.35
(85)
3.23
(82)
3.73
(95)
45.26
(1,150)
Average snowfall inches (cm) 7.7
(20)
6.7
(17)
3.4
(8.6)
0.4
(1.0)
0.0
(0.0)
0.0
(0.0)
0.0
(0.0)
0.0
(0.0)
0.0
(0.0)
0.2
(0.51)
0.8
(2.0)
4.1
(10)
23.3
(59)
Average precipitation days (≥ 0.01 in) 13.2 12.0 12.5 13.1 13.5 11.8 11.0 8.9 8.3 8.7 10.3 12.4 135.7
Average snowy days (≥ 0.1 in) 6.7 5.9 2.7 0.6 0.0 0.0 0.0 0.0 0.0 0.1 1.1 4.6 21.7
Average relative humidity (%) 72.2 70.1 67.0 62.8 66.9 69.2 71.5 72.3 72.7 69.2 71.0 73.8 69.9
Average dew point °F (°C) 19.9
(−6.7)
22.5
(−5.3)
31.3
(−0.4)
39.6
(4.2)
50.5
(10.3)
59.7
(15.4)
64.2
(17.9)
63.0
(17.2)
56.7
(13.7)
43.7
(6.5)
34.7
(1.5)
25.5
(−3.6)
42.6
(5.9)
Mean monthly sunshine hours 120.8 128.4 170.1 211.0 249.9 275.5 277.0 261.5 234.4 188.8 118.7 99.3 2,335.4
Percent possible sunshine 40 43 46 53 56 62 61 62 63 55 39 34 52
Average ultraviolet index 2 3 5 6 8 9 9 8 7 4 2 2 5
Source 1: NOAA (relative humidity and sun 1961–1990)
Source 2: Weather Atlas (UV)

Transportation

A map of Greater Cincinnati's freeways.

Public transportation

The Connector streetcar line opened in Cincinnati in 2016. Amtrak's Cardinal makes three weekly trips in each direction between Chicago and New York City through Cincinnati Union Terminal. Regional transit authorities serving the area include the Southwest Ohio Regional Transit Authority (SORTA), the Transit Authority of Northern Kentucky (TANK) and the Clermont Transportation Connection. SORTA and TANK primarily operate 40-foot (12 m) diesel buses, though some lines are served by longer articulated or hybrid-engine buses.

Air

The Cincinnati area is served by Cincinnati/Northern Kentucky International Airport (CVG) in Hebron, Kentucky. The airport is one of DHL Aviation's three superhubs, offering non-stop passenger service to over 50 destinations in North America and Europe. The airport is a global hub for Amazon Air, Atlas Air, ABX Air, Kalitta Air, and DHL Aviation, handling numerous domestic and international cargo flights every day. CVG is currently the 6th busiest airport in the United States by cargo traffic, and is additionally the fastest-growing cargo airport in North America.

Roads

Interstate 71/Interstate 75 heading northbound into Cincinnati, Ohio from Covington, Kentucky

US Highways

Ohio State Highways

Kentucky State Highways

Historic and notable roads

Education

Ohio

Kentucky

Indiana


Area codes

In media

Cincinnati-based broadcast media outlets often use the terms "Greater Cincinnati" and "Tri-State Area" to refer to their broader viewing or listening areas, especially for the purpose of weather reports or school closings. The viewing areas of WLWT, WCPO-TV, and WKRC-TV all span the same 26 counties, including Adams and Highland counties in Ohio; Fayette, Ripley, Switzerland, and Union counties in Indiana; and Carroll, Owen, and Robertson counties in Kentucky. WXIX-TV additionally includes Decatur County in Indiana and Lewis County in Kentucky.

Dayton-area media outlets similarly refer to a Miami Valley area that includes Butler and Warren counties in Ohio and sometimes Clinton County, Ohio, and Union County, Indiana.

39°0′N 84°30′W / 39.000°N 84.500°W / 39.000; -84.500


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