Neilsen is a less common spelling of the surnames Nielsen or Neilson. Notable people with the name include:
- Hans Peter Mareus Neilsen Gammel (1854âÂÂ1931), a Danish-American author and publisher of books covering legislation in the state of Texas
- Lorri Neilsen Glenn, Canadian contemporary poet, ethnographer, and essayist
- Jade Neilsen (born 1991), Australian competition swimmer
- Philip Neilsen (born 1949), Australian contemporary poet and fiction writer
- Shirley Neilsen Blum (born 1932), American art historian, author, gallerist, and professor.
See also