Oklahoma
URL: https://knowledge.ivjn.us/en/places/oklahoma.html

Oklahoma is a state of the United States with FIPS code 40 and capital Oklahoma City.

## Administrative divisions

Oklahoma is a state of the United States with FIPS state code 40[^uscb2023]. Below the state level are counties (or independent cities), then municipalities and neighborhoods[^uscb2023].

## Basic facts

- FIPS state code: 40[^uscb2023]
- Capital: Oklahoma City[^enwiki]
- Population: about 4,053,824 (2023 estimate)[^uscb2023]
- Area: 181,037 km2[^enwiki]
- Admitted to the Union: 1907[^enwiki]
- Time zone: Central Time (UTC-6/-5)[^enwiki]
- ISO 3166-2: US-OK[^enwiki]

## Parent division

Located in [United States](https://knowledge.ivjn.us/en/places/united-states.html).

## Subdivisions

Major counties: [Oklahoma County](https://knowledge.ivjn.us/en/places/ok-oklahoma-county.html), [Tulsa County](https://knowledge.ivjn.us/en/places/ok-tulsa-county.html), [Cleveland County](https://knowledge.ivjn.us/en/places/ok-cleveland-county.html), [Comanche County](https://knowledge.ivjn.us/en/places/ok-comanche-county.html), [Payne County](https://knowledge.ivjn.us/en/places/ok-payne-county.html).

Major cities: [Oklahoma City](https://knowledge.ivjn.us/en/places/ok-oklahoma-city.html), [Tulsa](https://knowledge.ivjn.us/en/places/ok-tulsa.html), [Norman](https://knowledge.ivjn.us/en/places/ok-norman.html), [Broken Arrow](https://knowledge.ivjn.us/en/places/ok-broken-arrow.html).

Updated: 2026-10-29

Relations:
- Located in: United States https://knowledge.ivjn.us/en/places/united-states.html
- Contains places: Oklahoma County https://knowledge.ivjn.us/en/places/ok-oklahoma-county.html
- Contains places: Tulsa County https://knowledge.ivjn.us/en/places/ok-tulsa-county.html
- Contains places: Comanche County https://knowledge.ivjn.us/en/places/ok-comanche-county.html
- Contains places: Cleveland County https://knowledge.ivjn.us/en/places/ok-cleveland-county.html
- Contains places: Payne County https://knowledge.ivjn.us/en/places/ok-payne-county.html
- Contains places: Norman https://knowledge.ivjn.us/en/places/ok-norman.html
- Contains places: Oklahoma City https://knowledge.ivjn.us/en/places/ok-oklahoma-city.html
- Contains places: Tulsa https://knowledge.ivjn.us/en/places/ok-tulsa.html
- Contains places: Broken Arrow https://knowledge.ivjn.us/en/places/ok-broken-arrow.html
- Contains places: Alfalfa County https://knowledge.ivjn.us/en/places/ok-alfalfa-county.html

Mentioned in:
- Achille https://knowledge.ivjn.us/en/places/ok-achille.html
- Ada https://knowledge.ivjn.us/en/places/ok-ada.html
- Adair https://knowledge.ivjn.us/en/places/ok-adair.html
- Adair County https://knowledge.ivjn.us/en/places/ok-adair-county.html
- Addington https://knowledge.ivjn.us/en/places/ok-addington.html
- Afton https://knowledge.ivjn.us/en/places/ok-afton.html
- Agra https://knowledge.ivjn.us/en/places/ok-agra.html
- Akins https://knowledge.ivjn.us/en/places/ok-akins.html
- Albany https://knowledge.ivjn.us/en/places/ok-albany.html
- Albion https://knowledge.ivjn.us/en/places/ok-albion.html

Sources:
- Oklahoma (Wikipedia) https://en.wikipedia.org/wiki/Oklahoma
- U.S. Census Bureau 2023 FIPS state and county codes https://www.census.gov/library/reference/code-lists/ansi.html