Crescent City, California. This article is about the city in Northern California. For other cities with the same name, see Crescent City (disambiguation). Crescent City (Chetco-Tolowa: Taa-’at-dvn, Yurok: Kohpey, Wiyot: Daluwagh ) is the county seat and only incorporated city in Del Norte County, California. Named for the crescent-shaped stretch of sandy beach south of the city, Crescent City had a total population of 7,643 in the 2010 census, up from 4,006 in the 2000 census.