Pine Grove is a census-designated place[4] in Amador County, California.

The current boundaries of Pine Grove include the former mining towns of Clinton and Irishtown.

The town also is home to Indian Grinding Rock State Historic Park.

[7] The 2010 United States Census[8] reported that Pine Grove had a population of 2,219.

[10] Federally, Pine Grove is in California's 4th congressional district, represented by Democrat Mike Thompson.