María Guillermina (Guille) Valdes Villalva (also known as Guillermina Valdez de Villalva or Villalba, December 15, 1939 – September 11, 1991) was a Chicana scholar and activist born in El Paso, Texas. She was considered an "authority" and "pioneer" on researching United States-Mexico border issues and had a "lifelong commitment to social justice."