Vallecito Creek is a tributary stream of Carrizo Creek, in San Diego County, California.
Vallecito Creek has its source at the southeast end of Mason Valley 32°59′05″N 116°25′19″W / 32.98472°N 116.42194°W as a continuation of Vallecito Wash. From its mouth the creek arises and flows southeastward about 19 miles, through Vallecito (Little Valley) and Carrizo Valley to its confluence with Carrizo Creek.
Coordinates: 32°52′24″N 116°08′38″W / 32.87333°N 116.14389°W