Alberto Antonio Peña Jr. (December 15, 1917 - July 3, 2006) was an American civil rights activist. Originally from San Antonio, Texas, Peña sought to improve the treatment of Mexican-Americans in his local community. With his schooling in law, Peña fought several school districts on their segregation policies which won him popularity within civil rights circles. He served four terms as Bexar County Commissioner from 1956 to 1972. He was well-known not only in the Mexican American community but also the African-American community and often aided the NAACP in their goals as well.