| City/Town | Area Code | Zip Code | County | Code |
| Lahoma | 405 | 73754 | Garfield | 40047 |
| Lamar | 405 | 74850 | Hughes | 40063 |
| Lamont | 405 | 74643 | Grant | 40053 |
| Lane | 405 | 74555 | Atoka | 40005 |
| Langley | 918 | 74350 | Mayes | 40097 |
| Langston | 405 | 73050 | Logan | 40083 |
| Laverne | 405 | 73848 | Harper | 40059 |
| Lawton | 405 | 73501 | Comanche | 40031 |
| 73502 | ||||
| 73505 | ||||
| 73507 | ||||
| Leach | 918 | 74364 | Delaware | 40041 |
| Lebanon | 405 | 73440 | Marshall | 40095 |
| Leedey | 405 | 73654 | Dewey | 40043 |
| LaFlore | 918 | 74942 | LeFlore | 40079 |
| Lehigh | 405 | 74556 | Atoka | 40005 |
| Lenapah | 918 | 74042 | Nowata | 40105 |
| Lenna | 918 | 74432 | McIntosh | 40091 |
| Leon | 405 | 73441 | Love | 40085 |
| Leonard | 918 | 74043 | Tulsa | 40143 |
| Lequire | 918 | 74943 | Haskell | 40061 |
| Lexington | 405 | 73051 | Cleveland | 40027 |
| Lindsay | 405 | 73052 | Garvin | 40049 |
| Loco | 405 | 73442 | Stephens | 40137 |
| Locust Grove | 918 | 74352 | Mayes | 40097 |
| Logan | 405 | 73849 | Beaver | 40007 |
| Lone Grove | 405 | 73443 | Carter | 40019 |
| Lone Wolf | 405 | 73655 | Kiowa | 40075 |
| Longdale | 405 | 73755 | Blaine | 40011 |
| Lookeba | 405 | 73053 | Caddo | 40015 |
| Loveland | 405 | 73553 | Tillman | 40141 |
| Loyal | 405 | 73756 | Kingfisher | 40073 |
| Lucien | 405 | 73757 | Noble | 40103 |
| Luther | 405 | 73054 | Oklahoma | 40109 |