[3] The incumbent mayor, Vojko Obersnel of the Social Democratic Party (SDP), announced on 6 November 2020 that he would be retiring at the end of his sixth consecutive term in office.

Filipović is defending the "long-time stronghold" of the SDP against independent centre-right candidate Štimac.

[5] The percentages of votes from each candidate are calculated from number of valid voters The percentages of valid and invalid votes are calculated from the turnout number The turnout percentage is calculated from the number of expected voters The percentages of votes from each list are calculated from number of valid voters The percentages of valid and invalid votes are calculated from the turnout number The turnout percentage is calculated from the number of expected voters The percentages of valid and invalid votes are calculated from the turnout number The turnout percentage is calculated from the number of expected voters Workers' Front's announcement of Katarina Peović's candidature for the mayor of Rijeka caused a rift in the Green–Left Coalition and ultimately resulted in the expulsion of the Workers' Front from the coalition in December 2020, ahead of the elections.

[6] The constituent session of the city council was held on June 29 at the Croatian Cultural Center in Sušak.

Ana Trošelj (PGS) was elected president of the council, and Josip Ostrogović (HDZ) and Željko Jovanović (SDP) were elected vice presidents.