| Arne Thomassen | |
| Office: | County Mayor of Agder |
| Term Start: | 23 October 2019 |
| Deputy: | Bjørn Ropstad Jorunn Gleditsch Lossius |
| Predecessor: | Position established |
| Office2: | Mayor of Lillesand |
| Term Start2: | October 2003 |
| Term End2: | 17 October 2019 |
| Deputy2: | Arve Danielsen Tor Audun Danielsen Hege Marie Holthe Jorunn Gleditsch Lossius |
| Predecessor2: | Odd Steinsdal |
| Successor2: | Einar Holmer-Hoven |
| Office3: | Deputy Member of the Storting |
| Term Start3: | 1 October 2009 |
| Term End3: | 30 September 2021 |
| Constituency3: | Aust-Agder |
| Birth Date: | 13 February 1959 |
| Birth Place: | Lillesand, Aust-Agder, Norway |
| Nationality: | Norwegian |
| Occupation: | Plumber Politician |
| Party: | Conservative |
Arne Thomassen (born 13 February 1959) is a Norwegian politician for the Conservative Party. He has served as county mayor of Agder since 2019. He previously served as mayor of Lillesand between 2003 and 2019 and a deputy member of parliament for Aust-Agder between 2009 and 2021.
He served as a deputy representative to the Storting from Aust-Agder between 2009 and 2021, having been re-elected in 2013 and 2017.
He has been an elected member of Aust-Agder county council and served as the leader of Aust-Agder Conservative Party. He also served as mayor of Lillesand between 2003 and 2019,[1] securing re-election in 2007, 2011 and 2015.[2] [3] He was succeeded by fellow party member Einar Holmer-Hoven in 2019.[4] [5]
He was elected county mayor of Agder at the 2019 local elections, becoming the first county mayor of a unified Agder county.[6] He won re-election at the 2023 local elections.[7]