Derby Acres is a census-designated place (CDP) in Kern County, California, United States. Derby Acres is located 5.5 miles (8.9 km) north-northwest of Fellows, at an elevation of 1,375 feet (419 m). The population was 322 at the 2010 census, down from 376 at the 2000 census. The town is on State Route 33 at the northern extremity of the Midway-Sunset Oil Field, about five miles (8 km)five miles southeast of McKittrick.