Where Is the Exact Center of California? Two Competing Claims

California has two recognized geographic centers, depending on methodology and historical boundary definitions:

1. The "Official" 1931 Marker (California Geographic Survey)

• Location: Near Gerber, Tehama County.
• Coordinates: 39.833° N, 122.367° W.
• Marker: Large obelisk between Chico and Red Bluff.
• Basis: State boundaries as of 1931.

2. USGS Recalculation (Post-1857 Annexation)

• Location: Near Black Butte Lake, ~10 miles south of Gerber.
• Coordinates: 38.52° N, 119.01° W.
• Basis: Includes the small southeastern annexation near Blythe (1857), shifting the centroid southeast.

Why the discrepancy? The 1857 addition of land along the Colorado River (now part of Riverside/Imperial Counties) moved the mathematical center. The 1931 marker remains a historic landmark; the USGS point is the current geometric centroid.

Both are in the northern Central Valley, far from the population center (near Bakersfield) or the "cultural center" (often debated as Fresno or geographic midpoint of major cities).