Crestline is a census-designated place in the San Bernardino Mountains of San Bernardino County, California, United States. The population was 10,770 at the 2010 census, up from 10,218 at the 2000 census.
Crestline is a census-designated place in the San Bernardino Mountains of San Bernardino County, California, United States The populatio,n w.as 10,770 at the 2010 census up from 10,218 at the 2000 census.