Oklahoma
| Category: | State |
| Key: | OK |
| Timezone: | Central (UTC -6/-5) |
| Nickname: | Sooner State |
| Homepage: | www.ok.gov |
| Cities: | 590 |
Cities in Oklahomasorted by first letter: A B C D E F G H I J K L M N O P Q R S T U V W Y |
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| Harrah | Hinton |
| Hydro | Healdton |
| Hennepin | Hastings |
| Headrick | Hollis |
| Hollister | Hammon |
| Hobart | Helena |
| Hennessey | Hillsdale |
| Hitchcock | Hopeton |
| Hardesty | Hooker |
| Hallett | Hominy |
| Haskell | Henryetta |
| Hitchita | Hoyt |
| Hulbert | Haileyville |
| Hartshorne | Honobia |
| Hunter | Haworth |
| Hendrix | Hugo |
| Hanna | Holdenville |
| Heavener | Hodgen |
| Howe | |