Founded in 1876, Armstrong County is one of 254 counties in the state of Texas. Historically, Armstrong County was formed from Bexar County. The city of Claude is the county seat. With FIPS code of 11, Armstrong County has a population of 1,839 and area of 914 square miles (2,367 km2).
List of all cities in Armstrong County, TX alphabetically
| City/Town | Postal Code | Area Code |
| Claude, TX | 79019 | 806 |
| Wayside, TX | 79094 | 806 |