Olssen is a surname. Notable people with the name include:
Betty Olssen, Fijian international lawn bowler Erik Olssen ONZM FRSNZ (born 1941), New Zealand historian Gyda Ellefsplass Olssen (born 1978), Norwegian sport shooter Jabez Olssen (born 1975), New Zealand film and television editor Lance Olssen (born 1947), American professional football offensive lineman Mark Olssen, FAcSS, political theorist and University of Surrey professor