Silas Chapman (June 9, 1813 - December 14, 1899) was a Milwaukee map and book publisher known primarily for his maps of the upper Midwest, which were influential at a pivotal time of the settlement of that region. When he arrived in Milwaukee harbor in 1841, there were 2,000 inhabitants, the roads were crude, most of the area was oak prairie, and the towns of the region had not yet been settled.