Founded in 1846, Grayson County is one of 254 counties in the state of Texas. Historically, Grayson County was formed from Fannin County. The city of Sherman is the county seat. With FIPS code of 181, Grayson County has a population of 139,336 and area of 934 square miles (2,419 km2).
List of all cities in Grayson County, TX alphabetically
| City/Town | Postal Code | Area Code |
| Bells, TX | 75414 | 903/430 |
| Collinsville, TX | 76233 | 903/430 |
| Denison, TX | 75020 | 903/430 |
| 75021 | 903/430 | |
| Dorchester, TX | 75459 | 903/430 |
| Fink, TX | 75076 | 903/430 |
| Gordonville, TX | 76245 | 903/430 |
| Gunter, TX | 75058 | 903/430 |
| Howe, TX | 75459 | 903/430 |
| Pottsboro, TX | 75076 | 903/430 |
| Sadler, TX | 76264 | 903/430 |
| Sherman, TX | 75090 | 903/430 |
| 75091 | 903/430 | |
| 75092 | 903/430 | |
| Southmayd, TX | 76268 | 903/430 |
| Tioga, TX | 76271 | 254 |
| Tom Bean, TX | 75489 | 903/430 |
| Van Alstyne, TX | 75495 | 903/430 |
| Whitesboro, TX | 76273 | 903/430 |
| Whitewright, TX | 75491 | 903/430 |