Commissioner: A member of a permanently constituted commission or government board.
Oxford English Dictionary
In most states, the main political unit was the County, and Commissioners were responsible of maintaining the county roads, poor house, county buildings, collection of taxes and other related business.
1787 - 1824: Delaware, Illinois, Indiana, Ohio, Pennsylvania
Office Scope: County / Town(ship) / Hundred / District
Role Scope: County / Town(ship) / Hundred / District
Scope Note: In most of Pennyslvania, this is a County position, but due to the minor civil divisions around Philadelphia, it is also a position for the township of Northern Liberties and the District of Spring Garden.