Steyn is a Dutch surname, and may refer to:
Christo Steyn (born 1961), South African tennis player
Dale Steyn (born 1983), South African cricketer
François Steyn (born 1987), South African rugby union player
Johan Steyn, Baron Steyn (born 1932), South African jurist
Herman Steyn (born 1951), South African author on Project Management
Lucas Cornelius Steyn (1903–1976), South African politician
Mark Steyn (born 1959), Canadian journalist
Martinus Theunis Steyn (1857–1916), South African lawyer, politician, and statesman
Morné Steyn (born 1984), South African rugby union player
Paul Steyn (born 1984), Namibian cricketer
Pieter Steyn (1706–1772), Dutch politician
Rudi Steyn (born 1967), South African cricketer
Vance Backlin Steyn (born 1973), South African Surfer
