Emergency Biohazard Cleanup Services in Walnut Grove, CA

Walnut Grove is an unincorporated census-designated place in Sacramento County, a historic river town in the Sacramento–San Joaquin River Delta about 30 miles south of Sacramento.

Founded in 1851, Walnut Grove served as an important river port between Sacramento and San Francisco in the heart of the Delta.

The town had a population of 1,452 at the 2020 Census, down from 1,542 in 2010.

Walnut Grove is one of the only remaining Japanese-American built towns in the United States — its Japanese-American Historic District is a National Historic Landmark, and about 40 of the original buildings still stand.

Chinese immigrants built much of the Delta's levee network in the 1870s and 1880s, and Walnut Grove grew a thriving Chinatown whose Bing Kong Tong Society branch once had more than 400 active members from throughout the Delta.

Japanese immigrants followed to work the Delta's asparagus farms, opening the town's first known Japanese-owned business — a noodle shop — in 1896, and calling the area Kawashimo, meaning 'downriver.'

After a devastating fire in 1915, the town was rebuilt, and its Japanese-American district was reconstructed in 1916 and thrived through the 1920s and 1930s.

During World War II, Walnut Grove's Japanese-American residents were evacuated under Executive Order 9066, and Filipino and Mexican farmworkers moved into the district.

Both the Japanese-American and Chinese historic districts were added to the National Register of Historic Places in 1990, and the district's streets still look much as they did in the 1920s.

The Census Bureau counts neighboring Locke — the famous Chinese-built Delta town — as part of the Walnut Grove CDP.