The government of Portland, Oregon is based on a city commission government system. Elected officials include the mayor, commissioners, and a city auditor. The mayor and commissioners are responsible for legislative policy and oversee the various bureaus that oversee the day-to-day operation of the city. Portland began using a commission form of government in 1913 following a public vote on May 3 of that year. Each elected official serves a four-year term, without term limits. Each city council member is elected at-large.

The Portland Police Bureau (PPB), officially the Portland Bureau of Police, is the law enforcement agency of the city of Portland, the largest city in the U.S. state of Oregon. While oversight of Portland's bureaus shifts among the five City Commissioners, the mayor has historically been assigned to the Police Bureau as the police commissioner.