Union Cemetery is a historic cemetery on Woodside Road (CA 84) near El Camino Real in Redwood City, San Mateo County, California.

[4] Founded in 1859, this is the site of the first American burial ground in San Mateo County, and was originally located just outside the town limits of Redwood City.

[5][4] The cemetery officially closed in 1918, but it was used for many years after that for burial of the poor.

[5] There are special cemetery plots for the Masonic Order, members of the International Order of Odd Fellows and the California volunteers who fought during the Civil War.

[6] It was vandalized in 1958, 1959 and 1969, but was subsequently repaired, and in 1999 it was replaced with a replica constructed of more durable material.