| Official Name: | Flagg, Texas |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | Texas#USA |
| Pushpin Label: | Flagg |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Texas |
| Subdivision Type2: | County |
| Subdivision Name2: | Castro |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 3796 |
| Coordinates: | 34.4261°N -102.41°W |
| Area Code: | 806 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 1379774 |
Flagg is an unincorporated community in Castro County, Texas, United States. According to the Handbook of Texas, the community had an estimated population of 30 in 2000.
Flagg is located at the intersection of Farm to Market Roads 1055 and 1524, 12miles southeast of Dimmitt, 34miles east of Bovina, and 23miles south of Hereford in southwestern Castro County.[1]
In 1925, Flagg had a school and the school district was formally created four years later. The community joined the Dimmitt Independent School District in 1945.