Lake Nacimiento is a census-designated place (CDP) in northern San Luis Obispo County, California, United States.The population of Lake Nacimiento was 2,411 at the 2010 census, up from 2,176 at the 2000 census.GeographyThe community of Lake Nacimiento is located at Lake Nacimiento reservoir, in the Santa Lucia Mountains, at (35.737585, -120.881328).According to the United States Census Bureau, the CDP has a total area of 10.3sqmi, 99.77% of it land and 0.23% of it water. The lake is often referred to as Dragon Lake, due to its unusual but distinct shape.ClimateThe Köppen Climate Classification subtype for this climate is "Csb" (Mediterranean Climate).Demographics2010The 2010 United States Census reported that Lake Nacimiento had a population of 2,411. The population density was 234.3 people per square mile (90.5/km²). The racial makeup of Lake Nacimiento was 2,153 (89.3%) White, 12 (0.5%) African American, 44 (1.8%) Native American, 24 (1.0%) Asian, 5 (0.2%) Pacific Islander, 75 (3.1%) from other races, and 98 (4.1%) from two or more races. Hispanic or Latino of any race were 256 persons (10.6%).