When California became a state in 1850, San Mateo County was part of San Francisco County. On April 19, 1856, Governor John Neely Johnson signed the Consolidation Act creating San Mateo County. Discover San Mateo County in the 1850s is intended to encourage children to explore what life was like when the county was new. Click here for the activity book.
Jennifer DiSanto won the Sesquicentennial Poster Contest for her drawing of Transportation in the 1850s.
The San Mateo County Historical Association created children's activity books in honor of the county's sesquicentennial in 2006 and the centennial of the Old Courthouse, home of the San Mateo County History Museum, in 2010. Both activity books include coloring pages, dot-to-dot activities, mazes, crossword puzzles, word search puzzles and more.
In 1910, San Mateo County celebrated the completion of a new courthouse. Home to all county government, its beautiful design compared favorably to any courthouse in California. Discover San Mateo County in the 1910s is intended to encourage children to explore what life was like when the Courthouse was new. Click here for the activity book.