Bylsma or Bijlsma is a surname. Notable people with the surname include:
Anner Bylsma (1934–2019), Dutch cellist Dan Bylsma (born 1970), former American hockey player and former head coach of the Pittsburgh Penguins John Bylsma (born 1948), Australian cyclist Jim Bylsma. (born 1954) high school football coach in Wisconsin
See also Bijlsma, the spelling more common within the Netherlands