Randolph Foster High School is a secondary school located in unincorporated Fort Bend County, Texas, United States, north of Richmond.
The school is part of the Lamar Consolidated Independent School District. It opened in 2001, with the intent of relieving the student population at nearby B.F. Terry High School and Lamar Consolidated High School. Foster serves unincorporated portions of Fort Bend County, the city of Simonton, the LCISD portion of Fulshear, a small portion of Rosenberg, and the communities of Cumings, Foster, and Lakemont.
Briscoe Junior High feeds into Foster High School.