Isleton is a city in Sacramento County, California, United States. The population was 804 at the 2010 census, down from 828 at the 2000 census. It is located on Andrus Island amid the slough wetlands of the Sacramento-San Joaquin River Delta, on the eastern edge of the Rio Vista Gas Field.
The city has many preserved 19th-century era storefronts along its main street, some of which show distinct Chinese influences. Chinese began immigrating to Isleton around 1875, and at its peak, the Chinese section of the city had about 1,500 people and included a branch of the Bing Kong Tong. The city also had a Japantown, just east of Chinatown.
Isleton is part of the Sacramento–Arden-Arcade–Roseville Metropolitan Statistical Area and Rio Vista Micropolitan Statistical Area. California State Route 160 passes through the city and crosses the 1923 Isleton Bridge.
According to the United States Census Bureau, the city has a total area of 0.5 square miles (1.3 km2), of which, 0.4 square miles (1.0 km2) of it is land and 0.05 square miles (0.13 km2) of it (10.50%) is water.