| Office: | Minister of Local Government |
| Term Start: | 3 October 1980 |
| Term End: | 14 October 1981 |
| Primeminister: | Odvar Nordli Gro Harlem Brundtland |
| Predecessor: | Inger Louise Valle |
| Successor: | Arne Rettedal |
| Birth Date: | 6 May 1925 |
| Birth Place: | Vikna, Nord-Trøndelag, Norway |
| Death Place: | Rælingen, Akershus, Norway |
| Party: | Labour |
Harriet Andreassen (6 May 1925 – 10 February 1997) was a Norwegian labour activist and politician for the Labour Party. Born in Vikna, she was secretary of the union Norsk Arbeidsmandsforbund (Union of Norwegian Working Men) from 1967 to 1977, and of the Norwegian Confederation of Trade Unions (LO) from 1977 to 1985. On 3 October 1980, upon the resignation of Inger Louise Valle, she was appointed Minister of Local Government in the government of Odvar Nordli (1976–1981), and remained in this position throughout the short-lived first government of Gro Harlem Brundtland in 1981.