Line Højmark Kjærsfeldt (born 20 April 1994) is a Danish badminton player specializing in singles.

She won a bronze medal at the 2010 BWF World Junior Championships in the women's doubles with Sandra-Maria Jensen.

[4] She competed at the 2010 World Junior Championships and won the bronze medal in the girls' doubles partnered with Sandra-Maria Jensen, after in the semi-finals, they were beaten by the Chinese pair Bao Yixin and Ou Dongni in straight games.

[13] In March, she clinched the girls' singles silver medal at the European Junior Championships, after being defeated by Bulgarian Stefani Stoeva in the final.

[3] She then won a Grand Prix title at the Scottish Open beating home favorite Kirsty Gilmour in the final in three games.