Benjamin or Ben Kelsey (1813 Kentucky – February 19, 1889 Los Angeles, California) was an early American pioneer of California with his brothers Andy and Sam Kelsey. He was a founder, often with one or more of his brothers, of several settlements in California. Kelsey was born in Kentucky in 1813. He and his wife Nancy Kelsey arrived in Alta California in the Bartleson–Bidwell Party in 1841. In 1844, he brought a party of immigrants including his father David and brother Samuel from Oregon on the Siskiyou Trail to Sutter's Fort.