Jansma is a surname of Dutch origin. People with that surname include:
nl:Bintje Jansma (1888–1976), Dutch agriculturalist from Sumar, Netherlands after whom the potato cultivar Bintje is named
Danica Jansma (born before 2012), American winner of the beauty pageant Miss Montana Teen USA in 2012
Derek Jansma (born before 2011)), American Harvard Crimson men's volleyball player
nl:Jan Jansma (born 9 August 1962), Dutch international bridge player
Kristopher Jansma, American writer and novelist
Rik Jansma (born before 2006), Dutch chef, co-founder of the restaurant Basiliek in Harderwijk, Netherlands
Sijtse Jansma (1898–1977), Dutch tug of war competitor who competed in the 1920 Summer Olympics
Sybren Jansma (born 1982), Dutch bobsledder who has competed in the Winter Olympics
Timothy J. Jansma (active from 1977), American luthier
