William Disch (January 12, 1840 – 1912) was a Swiss-born member of the Wisconsin State Assembly.

During the American Civil War, he served with the 24th Wisconsin Volunteer Infantry Regiment of the Union Army.

Disch died in 1912 and was buried at Forest Home Cemetery.

Disch was elected to the Assembly for Milwaukee County's Third District in 1906 and 1908.

Previously, he had been a security guard at the Wisconsin State Capitol.