Founded in 1891, Oklahoma County is one of 77 counties in the state of Oklahoma. Historically, Oklahoma County was formed from unassigned Lands in Indian Territory, the County 2 in Oklahoma Territory. The city of Oklahoma City is the county seat. With FIPS code of 109, Oklahoma County has a population of 798,575 and area of 709 square miles (1,836 km2).
List of all cities in Oklahoma County, OK alphabetically
| City/Town | Postal Code | Area Code |
| Achille, OK | 73120 | 405 |
| Arcadia, OK | 73007 | 405 |
| Bank of Oklahoma, OK | 73196 | 405 |
| Bank One, OK | 73185 | 405 |
| Bethany, OK | 73008 | 405 |
| Choctaw, OK | 73020 | 405 |
| Del City, OK | 73115 | 405 |
| 73135 | 405 | |
| Edmond, OK | 73003 | 405 |
| 73012 | 405 | |
| 73013 | 405 | |
| 73025 | 405 | |
| 73034 | 405 | |
| 73083 | 405 | |
| Globe Life and Accident Co, OK | 73184 | 405 |
| Harrah, OK | 73045 | 405 |
| Jones, OK | 73049 | 405 |
| Luther, OK | 73054 | 405 |
| Midwest City, OK | 73110 | 405 |
| 73130 | 405 | |
| 73140 | 405 | |
| 73145 | 405 | |
| Nichols Hills, OK | 73116 | 405 |
| 73120 | 405 | |
| Nicoma Park, OK | 73066 | 405 |
| Ok Tax Comm, OK | 73194 | 405 |
| Okla University Health Sci Center, OK | 73190 | 405 |
| Oklahoma City, OK | 73101 | 405 |
| 73102 | 405 | |
| 73103 | 405 | |
| 73104 | 405 | |
| 73105 | 405 | |
| 73106 | 405 | |
| 73107 | 405 | |
| 73108 | 405 | |
| 73109 | 405 | |
| 73110 | 405 | |
| 73111 | 405 | |
| 73112 | 405 | |
| 73113 | 405 | |
| 73114 | 405 | |
| 73115 | 405 | |
| 73116 | 405 | |
| 73117 | 405 | |
| 73118 | 405 | |
| 73119 | 405 | |
| 73120 | 405 | |
| 73121 | 405 | |
| 73122 | 405 | |
| 73123 | 405 | |
| 73124 | 405 | |
| 73125 | 405 | |
| 73126 | 405 | |
| 73127 | 405 | |
| 73128 | 405 | |
| 73129 | 405 | |
| 73130 | 405 | |
| 73131 | 405 | |
| 73132 | 405 | |
| 73134 | 405 | |
| 73135 | 405 | |
| 73136 | 405 | |
| 73137 | 405 | |
| 73139 | 405 | |
| 73140 | 405 | |
| 73141 | 405 | |
| 73142 | 405 | |
| 73143 | 405 | |
| 73144 | 405 | |
| 73145 | 405 | |
| 73146 | 405 | |
| 73147 | 405 | |
| 73148 | 405 | |
| 73149 | 405 | |
| 73150 | 405 | |
| 73151 | 405 | |
| 73152 | 405 | |
| 73154 | 405 | |
| 73155 | 405 | |
| 73156 | 405 | |
| 73157 | 405 | |
| 73159 | 405 | |
| 73162 | 405 | |
| 73163 | 405 | |
| 73164 | 405 | |
| 73167 | 405 | |
| 73169 | 405 | |
| 73172 | 405 | |
| 73173 | 405 | |
| 73178 | 405 | |
| 73179 | 405 | |
| 73184 | 405 | |
| 73185 | 405 | |
| 73190 | 405 | |
| 73194 | 405 | |
| 73195 | 405 | |
| 73196 | 405 | |
| 73198 | 405 | |
| Spencer, OK | 73084 | 405 |
| T A F B, OK | 73145 | 405 |
| The Village, OK | 73120 | 405 |
| Tinker AFB, OK | 73145 | 405 |
| USPS Oklahoma Dist, OK | 73198 | 405 |
| Village, OK | 73120 | 405 |
| Warr Acres, OK | 73122 | 405 |
| 73123 | 405 | |
| 73132 | 405 | |
| Wheatland, OK | 73097 | 405 |