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Alpine is an unincorporated community in San Diego County, California, United States. The community is within a census-designated place (CDP) by the same name. The population of the CDP was 13,143 at the 2000 census.Alpine is the residence of United States Representative Duncan Hunter.lpine is an unincorporated community in San Diego County, California, United States. The community is within a census-designated place (CDP) by the same name. The population of the CDP was 13,143 at the 2000 census.
The primary coordinate point for Alpine is located at latitude 32.8423 and longitude -116.756 in San Diego County. The formal boundaries for the Alpine Census Designated Place (see map below) encompass a land area of 26.78 sq. miles and a water area of 0 sq. miles.San Diego County is in the Pacific time zone (GMT -8).he table below compares Alpine to the other 1,523 incorporated cities, towns and CDPs in California by rank and percentile using July 1, 2015 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.