This is a list of geographic place names, or toponyms, in Riverside County, California.
The county itself was named for the city of Riverside, the county seat, which in turn was named for its location beside the Santa Ana River.
33°57′50″N 117°33′50″W / 33.964°N 117.564°W / 33.964; -117.564 (Eastvale) Northwest end33°58′N 116°37′W / 33.97°N 116.62°W / 33.97; -116.62 (Coachella Valley) Source33°36′57″N 116°37′46″W / 33.6158°N 116.6294°W / 33.6158; -116.6294 (Garner Valley source) Dam33°39′40″N 116°42′22″W / 33.661°N 116.706°W / 33.661; -116.706 (Hemet Dam) Lake33°39′58″N 116°41′35″W / 33.666°N 116.693°W / 33.666; -116.693 (Lake Hemet) Valley(See Garner Valley) Mount Jurupa (peak)34°01′56″N 117°26′34″W / 34.0322°N 117.4428°W / 34.0322; -117.4428 (Mount Jurupa) Oak34°01′59″N 117°23′28″W / 34.033°N 117.391°W / 34.033; -117.391 (Jurupa Oak) Valley(See Jurupa Valley) Jurupa Mountains Discovery Center34°00′56″N 117°26′56″W / 34.0156°N 117.4489°W / 34.0156; -117.4489 (Jurupa Mountains Discovery Center) Canyon source33°44′10″N 117°15′11″W / 33.736°N 117.253°W / 33.736; -117.253 (Railroad Canyon) Dam33°40′34″N 117°16′23″W / 33.676°N 117.273°W / 33.676; -117.273 (Railroad Canyon) Reservoir33°41′20″N 117°16′05″W / 33.689°N 117.268°W / 33.689; -117.268 (Railroad Canyon) Little ~ Mountain33°37′44″N 116°41′28″W / 33.6289°N 116.6911°W / 33.6289; -116.6911 (Little Thomas Mountain) Mountain (Town)33°36′45″N 116°37′37″W / 33.6125°N 116.6270°W / 33.6125; -116.6270 (Thomas Mountain) Valley(See Garner Valley)