Nilsmark in 1995 married Henrik Wickberg and after their divorce, she 1998-2007 was married to Fredrik Hellqvist, sport journalist and former head of Swedish
European Tour tournament
Scandinavian Masters 2005–2013. During her LPGA Tour career, Nilsmark and Hellqvist, who changed his last name to Nilsmark, lived in
West Palm Beach, Florida, United States, in a house formerly owned by
Tony Jacklin and situated close to were Swedish golfer
Jesper Parnevik lived. She later married Per-Uno Sandberg and the couple resides in
Danderyd, north of
Stockholm, Sweden. She has two children, daughter Tuva Augusta, born 1997 and son, Sigge, born 2004. In the seventh month of her pregnancy in 1997, she competed in the LET tournament
Compaq Open in Stockholm, Sweden, finishing lone runner-up to
Annika Sörenstam, ahead of third placed
Nancy Lopez. The following week, she won on the
Swedish Golf Tour. She worked as a golf commentator in Sweden at the television channel Viasat Golf 2007–2017. ==Amateur wins==