Joensen is a surname. Notable people with the surname include:

• Bodil Joensen (1944–1985), Danish pornographic actress
• Edmund Joensen (born 1944), Faroese politician
• Hallur Joensen, Faroese country singer
• Heri Joensen (born 1973), Faroese musician
• Meinhardt Joensen, Faroese soccer player
• Ove Joensen (1948–1987), Faroese seaman and adventurer
• Pál Joensen (born 1990), Faroese elite swimmer
• Páll Mohr Joensen (born 1986), Faroese soccer player
• Poul F. Joensen (1898–1970), Faroese poet
• William Michael Joensen (born 1960), Bishop of the Catholic Diocese of Des Moines, USA
• Rannva Joensen (born 1986), Faroese former child star and singer

Joensen is the most common surname in the Faroe Islands. As of 1 January 2015 the number of people in the Faroe Islands with the surname Joensen was 2,365.^[1]

• Sámal Joensen-Mikines (1906–1979), Faroese painter