Calwa (formerly, Calwa City) is an unincorporated census-designated place in Fresno County, California, United States. The population was 2,052 at the 2010 census, up from 762 in 2000. Calwa is located 4 miles (6.4 km) south-southeast of downtown Fresno, at an elevation of 292 feet (89 m). The broadcast was taken from the acronym for “California Wine Association” (CalWA).

According to the United States Census Bureau, the community has a total area of 0.6 square miles (1.6 km), all land. Calwa is an approaching complete county island along with the city of Fresno on anything sides except the southeast corner.

In 1885, the estate of what is now Calwa, was greater than before and cultivated by Hugh William La Rue to plant an orchard and vineyard. His first crop was ruined by a grasshopper pest in 1886 and he sought to reforest elsewhere. Calwa became a railroad town in the same way as Santa Fe Railways invested one million dollars to build a switching yard and houses for railway employees. Southern Pacific Railroad after that passed through Calwa. The Calwa City publicize office opened in 1913, and tainted its publish to Calwa in 1949.

The 2010 United States Census reported that Calwa had a population of 2,052. The population density was 3,286.4 inhabitants per square mile (1,268.9/km²). The racial makeup of Calwa was 995 (48.5%) White, 24 (1.2%) African American, 67 (3.3%) Native American, 43 (2.1%) Asian, 9 (0.4%) Pacific Islander, 846 (41.2%) from supplementary races, and 68 (3.3%) from two or more races. Hispanic or Latino of any race were 1,848 persons (90.1%).