The mayor of Portland, Oregon is the official head of the city of Portland, Oregon, United States. The officeholder is elected for a four-year term and has no term limits. By law, all elections in Portland are nonpartisan.^[2] The current mayor is Ted Wheeler, who has served since 2017, and was first elected in the 2016 election.

The current term for mayor of Portland is four years, having been increased from two years in 1913.^[3] Mayoral elections were previously held in May of US presidential election years (years divisible by four), during the Oregon primary election, with a runoff between the top two vote-getters held in November of the same year should no candidate garner a majority vote in the May election, however a new system taking effect in 2024^[4] holds a single general election in November of Presidential election years using the Instant Runoff ranked choice voting method. The mayor-elect takes office the following January.

Portland uses a city commission government, the only major city to do so. The mayor and commissioners are responsible for legislative policy and oversee the various bureaus that oversee the day-to-day operation of the city.^[5] The mayor serves as chairman of the council, and is responsible for allocating department assignments to his fellow commissioners. His post is largely honorific; most powers exercised by mayors in cities of Portland's size are vested in the council as a whole. However, the mayor does have some powers, such as declaring an emergency and acting as police commissioner. Although, beginning with the 2025 mayoral term, Portland will switch to a Council-Mayor form of government.^[4] The executive mayor will work with a professional city administrator to implement the laws enacted by council and administer the city’s bureaus, employees, facilities, and resources.^[4] The executive mayor develops and proposes the city’s budget to council for review and approval, may introduce measures before the council, and breaks tie votes in the council.^[4]

The mayor is elected in citywide election. Elections utilize the instant runoff ranked choice voting method, beginning with the 2024 general election. The city charter also allows for write-in candidates. The mayor is elected to a four-year term with no term limits. The office of mayor is officially nonpartisan by state law, although most mayoral candidates identify a party preference. Mayoral elections happen in conjunction with the United States presidential election. Elections followed a two-round system prior to 2024 where the first round of the elections was a primary election. If a candidate received a majority of the vote in the primary they were elected outright, however, If no candidate received a majority the top two candidates advance to a runoff election, called the general election.

The most recent election was in 2020, when incumbent Ted Wheeler was reelected in the November runoff.

Note: The color shown in the number (#) column denotes political party (red for Republican, blue for Democratic, teal for the People's Party (Populist), gray for Independent).

The City of Portland mayor's office, in the City Hall, contains a collection of mounted portraits of all the mayors to date. As of February 2024, only two mayors are missing from the collection; William H. Farrar (1862–1863), and Hamilton Boyd (1868–1869).

• Government of Portland, Oregon
• History of Portland, Oregon