Jacob Sander (1828–1904) was an American cattle dealer from Milwaukee, Wisconsin who served a single term as a Liberal Reform Party member of the Wisconsin State Assembly.
He received a common school education, came to Wisconsin in 1849 and settled in Milwaukee, where he became a dealer in cattle.
He had held no public office before being elected as an independent candidate in 1872 from Milwaukee County's 2nd Assembly district (the 2nd Ward of the City of Milwaukee) with 796 votes, to 572 for Democratic incumbent George Abert.
[2] He did not run for re-election in 1873, and was succeeded by fellow Reformer Joseph Hamilton.
In 1877, with the Reform Party having folded, Sander ran for the 2nd District seat once more as an Independent, receiving 448 votes to 652 for "Reform Democrat" John C. Dick and 388 for Socialist George Tyre;[3] and in 1881 as a Republican against old rival George Abert, losing with 714 votes to 757 for Abert.