Founded in 1846, Denton County is one of 254 counties in the state of Texas. Historically, Denton County was formed from Fannin County. The city of Denton is the county seat. With FIPS code of 121, Denton County has a population of 941,647 and area of 888 square miles (2,300 km2).
List of all cities in Denton County, TX alphabetically
| City/Town | Postal Code | Area Code |
| Argyle, TX | 76226 | 940 |
| Aubrey, TX | 76227 | 940 |
| Bartonville, TX | 76226 | 940 |
| Carrollton, TX | 75007 | 214/469/972 |
| 75010 | 214/469/972 | |
| Copper Canyon, TX | 75077 | 214/469/972 |
| Corinth, TX | 76208 | 940 |
| 76210 | 940 | |
| Corral City, TX | 76226 | 940 |
| Crossroads, TX | 76227 | 940 |
| Denton, TX | 76201 | 940 |
| 76202 | 940 | |
| 76203 | 940 | |
| 76204 | 940 | |
| 76205 | 940 | |
| 76206 | 940 | |
| 76207 | 940 | |
| 76208 | 940 | |
| 76209 | 940 | |
| 76210 | 940 | |
| Double Oak, TX | 75077 | 214/469/972 |
| Flower Mound, TX | 75022 | 214/469/972 |
| 75027 | 214/469/972 | |
| 75028 | 214/469/972 | |
| Frisco, TX | 75034 | 214/469/972 |
| Hickory Creek, TX | 75065 | 940 |
| Highland Village, TX | 75077 | 214/469/972 |
| Justin, TX | 76247 | 940 |
| Keller, TX | 76262 | 817 |
| Krugerville, TX | 76227 | 940 |
| Krum, TX | 76249 | 940 |
| Lake Dallas, TX | 75065 | 940 |
| Lakewood Village, TX | 75068 | 214/469/972 |
| Lantana, TX | 76226 | 940 |
| Lewisville, TX | 75022 | 214/469/972 |
| 75027 | 214/469/972 | |
| 75028 | 214/469/972 | |
| 75029 | 214/469/972 | |
| 75056 | 214/469/972 | |
| 75057 | 214/469/972 | |
| 75067 | 214/469/972 | |
| 75077 | 214/469/972 | |
| Little Elm, TX | 75068 | 214/469/972 |
| Louisville, TX | 75067 | 214/469/972 |
| Oak Point, TX | 75068 | 214/469/972 |
| Pilot Point, TX | 76258 | 940 |
| Ponder, TX | 76259 | 940 |
| Providence Village, TX | 76227 | 940 |
| Roanoke, TX | 76262 | 817 |
| Sanger, TX | 76266 | 940 |
| Savannah, TX | 76227 | 940 |
| Shady Shores, TX | 76205 | 940 |
| 76208 | 940 | |
| The Colony, TX | 75056 | 214/469/972 |
| Trophy Club, TX | 76262 | 817 |
| Westlake, TX | 76262 | 817 |