The 1868 Hayward earthquake occurred in the San Francisco Bay Area, California, United States on October 21.

With an estimated moment magnitude of 6.3–6.7 and a maximum Mercalli intensity of IX (Violent), it was the most recent large earthquake to occur on the Hayward Fault Zone.

At the surface, ground rupture was traced for 20 miles (32 km), from San Leandro to what is now the Warm Springs District in Fremont.

[1] The United States Geological Survey estimates that Hayward experienced shaking measuring IX (Violent) on the modified Mercalli scale.

San Leandro experienced shaking measuring VIII (Severe), while San Francisco and Oakland experienced shaking measuring VII (Very strong).