Rancho San Miguelito was a 14,198-acre (57.46 km2) Mexican land grant in present-day San Luis Obispo County, California, given in 1842 by Governor Juan Alvarado to Miguel Ávila, and an addition granted in 1846 by Governor Pio Pico.
In 1816 Miguel Avila was in the Monterey company, and in 1824 he was corporal of the guard at Mission San Luis Obispo.
[4] With the cession of California to the United States following the Mexican-American War, the 1848 Treaty of Guadalupe Hidalgo provided that the land grants would be honored.
[5][6] Another claim by Miguel Avila for an addition to Rancho San Miguelito filed with the Land Commission in 1852 was also confirmed.
[7] A third claim by Miguel Avila for a two square league addition to Rancho San Miguelito filed with the Land Commission in 1852 was rejected.