Windsor is a locality in South Australia. It is on the northern Adelaide Plains adjacent to Port Wakefield Road, 34 km southeast of Port Wakefield. The township is largely bypassed by Port Wakefield Road.
The township was a private subdivision by George Baker c1876. By 1878 there was a school and Primitive Methodist Church, now Uniting Church. In 1884 the Windsor Institute was built, and has served the community as a hall and library for over 130 years. The town had an oval with concrete cricket pitch opposite the school and tennis courts, on Windsor Road. The oval was used until the 1960s by the school. It was established by 1883 and used by the Windsor Cricket Club.
There was a "Windsor Separator" brand of butter.
A post office (1877-1982) and store (1877-1985) operated from 1877 closing after the township was bypassed by Port Wakefield Road. The Windsor School closed in 1971.