List of ranchos of California

From 1773 to 1836, the border between Alta California and Baja California was about 30 miles south of the Mexico–United States border drawn by the Treaty of Guadalupe Hidalgo that ended the Mexican–American War in 1848.

Under the Siete Leyes constitutional reforms of 1836, the Alta California and Baja California territories were recombined into a single Las Californias "department", with a single governor. None of the rancho grants near the former border, however, were made after 1836, so none of them straddled the pre-1836 territorial border.

The result of the shifting borders is that some of the ranchos in this list, created by pre-1836 governors, are located partially or entirely in a 30-mile-wide sliver of the former Alta California that is now in Mexico rather than in the U.S. state of California. Since those ranchos remained in Mexico, in today's Mexican state of Baja California, the grants were not subject to review by the Public Land Commission except for Rancho Tijuan that had claimed part of its lands were on the American side of the border.

• Ranchos of California
  • Ranchos of Los Angeles County
  • Ranchos of Orange County
• Mexican land grants in Texas
• List of California Rancherias
• Las Californias topics – Spanish + Mexican California.
• 18th century in Alta California
• 19th century in California