Much of the land from the haciendas were broken up from 1915 to 1930 and made into communally held lands called ejidos. While the initial declarations were made in 1915, their implementation was delayed until 1930. These ejidos include Extortas, Rio Blanco, Las Enramadas, Peña Blanco, San Lorenzo, La Plazuela, Maguey Verde, El Pilón, Los Encinos, Agua Fria, Molinitos de Orozco, El Portugues, Camargo, La Higuera, El Tequizquite and San Isidro Boquillas. In 1936, much of the Peñamiller area was reformed as the Villa Zapata delegation of the municipality of Tolimán. In 1936, a rebel group led by Taurino López burned the municipal archives of Peñamiller. However, this rebel leader was found the next day hanged. The main church of the town of Peñamiller became a parish in 1937, and then it was named as head of its own municipality in 1941.
