Set in the western part of California, San Anselmo is a close-knit town, home to 12,645 residents as of the latest Census estimates.
Officially, San Anselmo is an incorporated town — local government on a neighborly scale. The community covers 2.67 square miles, giving it a compact, walkable footprint at roughly 4,736 residents per square mile.
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Public schools, U.S. Dept. of Education (NCES) 2023–24 directory.