The following is a timeline of race relations and policing in Minneapolis–Saint Paul, providing details with a history of policing in the Twin Cities in the U.S. state of Minnesota from the nineteenth century to the present day. The Hennepin County Sheriff's Office, with its headquarters in downtown Minneapolis, is one of the "largest law enforcement agencies in Minnesota" with division and unit facilities throughout Hennepin County. Twin cities, Saint Paul and Minneapolis, have their own police departments, the Minneapolis Police Department, which was established in 1867 and the Saint Paul Police Department. A union for rank and file officers in Minneapolis—the Police Officers Federation of Minneapolis (the Federation)—was established in 1917.