• county
  • FIPS 40087
  • Largest town: Newcastle

McClain County, Oklahoma

McClain County had 48,434 residents in the Census Vintage 2024 estimate, on 570.7 square miles of land. It ranks 20th of 77 in Oklahoma by population and 65th by land area.

Population
48,434
#20 of 77 in Oklahoma · #1,028 in US
Area
570.7 sq mi
#65 of 77 in Oklahoma · #1,767 in US
Density
85 / sq mi
#11 of 77 in Oklahoma · #1,033 in US
Median household income
$80,952
#2 of 77 in Oklahoma · #445 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

McClain County within Oklahoma. Pin: Oklahoma City.

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Tools and pages that start from McClain County

McClain County population, land area and income

McClain County had 48,434 residents in the Census Vintage 2024 estimate, on 570.7 square miles of land. It ranks 20th of 77 in Oklahoma by population and 65th by land area. That works out to 84.9 people per square mile, near the US average of 96.3, and above the national county median.

The median county-equivalent in Oklahoma has 20,577 residents, so McClain County is 2.4 times that size.

Its SAIPE 2023 median household income of $80,952 is in the top quarter among 3,143 counties with an estimate.

National rank among 3,144

Population

48,434

3144th1st

1028th of 3,144 (US)

Land area

571 sq mi

3144th1st

1767th of 3,144 (US)

Density

84.9 / sq mi

3144th1st

1033rd of 3,144 (US)

Median household income

$80,952

3143rd1st

445th of 3,143 (US)

Rank within Oklahoma (77)

Population

48,434

77th1st

20th of 77 (OK)

Land area

571 sq mi

77th1st

65th of 77 (OK)

Density

84.9 / sq mi

77th1st

11th of 77 (OK)

Median household income

$80,952

77th1st

2nd of 77 (OK)

How McClain County's population changed since 2020

McClain County gained 6,524 residents between the July 2020 and July 2024 estimates, a rise of 15.6%. That ranks 2nd of 77 in Oklahoma for growth. The median Oklahoma county changed by +0.8%, and the state as a whole by +3.3%.

Since the April 2020 estimates base, McClain County recorded 1,968 births and 1,949 deaths, a natural change of +19. Net international migration added +95 and net domestic migration, people moving to or from other US counties, came to +6,657. The largest single component was domestic migration, which added 6,657 people.

41.9k202043.5k202145.4k202247.1k202348.4k2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
1,968
Deaths
1,949
Net international migration
+95
Net domestic migration
+6,657
Change, July 2023 to July 2024
+1,374

Where McClain County is

The Census internal point of McClain County is at 35.016400, -97.449800. It sits in UTM zone 14N. The map shades Oklahoma's 77 county-equivalents by population change from 2020 to 2024, darker for faster growth, with McClain County outlined. Dots are towns of 1,000+ people with residents in it.

Kingfisher County: +4.2%Okfuskee County: +0.8%Creek County: +2.9%Carter County: +2.3%Hughes County: +0.2%Murray County: -0.9%Haskell County: +2.2%Cherokee County: +3.5%Grady County: +6.3%Canadian County: +16.9%Caddo County: -2.1%Garvin County: +1.9%Custer County: -0.6%Pushmataha County: +0.1%Mayes County: +2.8%Stephens County: +2.9%Dewey County: -4.6%Greer County: -1.1%Logan County: +8.3%Atoka County: +3.1%Nowata County: +2.5%Beckham County: -0.4%Cimarron County: -6.9%Harper County: -1.2%Cleveland County: +2.6%Texas County: -3.4%Marshall County: +5.3%Tulsa County: +3.4%McIntosh County: +4.0%Grant County: -1.3%Seminole County: -0.7%Garfield County: -1.1%Jackson County: -0.8%Blaine County: -1.5%Lincoln County: +4.4%Alfalfa County: +0.0%Jefferson County: +0.8%Okmulgee County: +1.1%Major County: -2.3%Noble County: -0.2%Oklahoma County: +2.3%Pawnee County: +3.5%Bryan County: +8.6%Payne County: +3.1%Adair County: +1.9%Harmon County: -6.5%Love County: +2.6%Craig County: +2.6%Rogers County: +6.3%Muskogee County: +0.8%Sequoyah County: +3.3%Delaware County: +3.4%Johnston County: +0.5%Pittsburg County: -0.9%Le Flore County: +3.4%McClain County: +15.6%Woodward County: -2.1%Ottawa County: +0.6%Choctaw County: -0.2%Cotton County: -0.6%Roger Mills County: -3.6%Washita County: -0.6%Coal County: +2.5%Pontotoc County: +0.6%Kiowa County: -2.8%Tillman County: -3.0%Ellis County: -3.9%Wagoner County: +12.1%Beaver County: -0.1%McCurtain County: -0.1%Kay County: -0.4%Pottawatomie County: +2.6%Osage County: +1.5%Comanche County: +0.2%Washington County: +2.8%Woods County: -0.2%Latimer County: +0.3%
Change 2020 to 2024
  1. < -1.1%
  2. < +0.0%
  3. < +2.2%
  4. < +3.3%
  5. ≥ +3.3%
no data

Orange pin: McClain County internal point. Dark pin: Oklahoma City.

Internal point

Decimal
35.016400, -97.449800
DMS
35°00'59.04"N 97°26'59.28"W
UTM
14N 641436.0E 3875959.8N
Geohash
9y4xnqx1r
Plus code
86742H82+H3

Towns in McClain County

5 incorporated places of 1,000+ people have residents in McClain County, 32,638 people together, or 67% of the county. Each figure counts only the part of the town inside McClain County; towns marked "part" extend into another county. The largest is Newcastle with 14,677.

  1. 01Newcastle14,677
  2. 02Blanchard (part)7,505
  3. 03Purcell6,938
  4. 04Goldsby3,516
  5. 05Maysville (part)2
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering McClain County

The Census 2024 county adjacency file lists 6 neighbors for McClain County. The most populous is Cleveland County, OK, with 303,952 residents. Distances run between Census internal points in a straight line.

Distance to Oklahoma City and the nearest big city

Oklahoma City is 33.0 miles N of McClain County's internal point in a straight line. The nearest place of 100,000 or more is Norman, OK (population 131,010), 16.6 miles away.

McClain County FIPS code

The FIPS code of McClain County is 40087: state code 40 for Oklahoma plus county code 087. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $80,952.

Questions people ask

What is the population of McClain County, Oklahoma?

The Census Vintage 2024 estimate for July 1, 2024 is 48,434. That is up 6,524 people (15.6%) from the July 2020 estimate of 41,910.

What is the FIPS code of McClain County?

40087. The first two digits (40) are Oklahoma; the last three (087) identify the county.

What is the largest town in McClain County?

Newcastle, with 14,677 residents inside McClain County in 2024.

Which counties border McClain County?

6 county-equivalents border it in the Census 2024 adjacency file: Cleveland County, OK; Canadian County, OK; Pottawatomie County, OK; Grady County, OK; Pontotoc County, OK; Garvin County, OK.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.