Palermo, California  Palermo is a census-designated place (CDP) in Butte County, California, United States. The population was 5,382 at the 2010 census, down from 5,720 at the 2000 census. According to the United States Census Bureau, the CDP has a total area of , of which, 99.95% of it is land and 0.05% is water. According to the Köppen Climate Classification system, Palermo has a warm-summer Mediterranean climate, abbreviated "Csa" on climate maps. The town was named after Palermo, Sicily due to its excellent climate for growing olives. The first post office was established in 1888. The area was home to a country club, two railroad stations, gold mining, a brick yard, library, general mercantile store, school and even a semi-pro baseball team. The rich clay soil attracted the planting of olive and orange orchards and a thriving zucca melon industry. Mining magnate George Hearst purchased 700 acres in 1888, and then subdivided. There is an annual festival held every September centered at Palermo Park to help raise funds to support the Palermo Community Council's Sheriff Substation. At the 2010 census Palermo had a population of 5,382. The population density was 184.5 people per square mile (71.2/km²). The racial makeup of Palermo was 3,901 (72.5%) White, 39 (0.7%) African American, 221 (4.1%) Native American, 246 (4.6%) Asian, 4 (0.1%) Pacific Islander, 642 (11.9%) from other races, and 329 (6.1%) from two or more races. Hispanic or Latino of any race were 1,281 persons (23.8%). The whole population lived in households, no one lived in non-institutionalized group quarters and no one was institutionalized. There were 1,940 households, 635 (32.7%) had children under the age of 18 living in them, 1,023 (52.7%) were opposite-sex married couples living together, 212 (10.9%) had a female householder with no husband present, 167 (8.6%) had a male householder with no wife present. There were 141 (7.3%) unmarried opposite-sex partnerships, and 7 (0.4%) same-sex married couples or partnerships. 416 households (21.4%) were one person and 184 (9.5%) had someone living alone who was 65 or older.