| Official Name: | Derby |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | Texas#USA |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Texas |
| Subdivision Type2: | County |
| Subdivision Name2: | Frio |
| Population As Of: | 2000 |
| Population Total: | 50 |
| Timezone: | Central (CST) |
| Coordinates: | 28.771°N -99.13°W |
| Postal Code Type: | ZIP |
| Postal Code: | 78061 |
| Area Code: | 830 |
Derby is an unincorporated community located in south-central Frio County in the U.S. state of Texas. The town is located on the Missouri Pacific Railroad, at the intersection of I-35 and FM 1583.
The town was formed in 1879 by John Bennett. In 1882, a post office was established under the name of Lenore, with the town later being renamed to Derby, after Bennett's hometown of Derby, England.[1] Derby was renamed to Otley, after the village of Otley, Suffolk. By 1906, the town was renamed to Derby. In 2009, the population of Derby was estimated to be 50.[2]
The town is served by the Pearsall Independent School District.