San Leandro is a city in Alameda County, California, United States. It is located in the East Bay of the San Francisco Bay Area; between Oakland to the northwest, and Ashland, Castro Valley, and Hayward to the southeast. The population was 91,008 as of the 2020 census.

Leander of Seville was a Hispano-Roman Catholic prelate who served as Bishop of Seville. He was instrumental in effecting the conversion of the Visigothic kings Hermenegild and Reccared to Chalcedonian Christianity. His brother was the encyclopedist Isidore of Seville.