Katrín Ómarsdóttir (born 27 June 1987) is an Icelandic football midfielder who plays for Liverpool Ladies of the English FA WSL. Before arriving at Liverpool in 2013, she had played professional football in Sweden and the United States. Katrín has over 50 caps for Iceland's national team and represented her country at the 2009 and 2013 editions of the UEFA Women's Championship.
Katrín attended the University of California, Berkeley in the United States and played for their women's soccer team from 2008 until 2010. She was signed by Kristianstads DFF of the Damallsvenskan for the summer of 2010. In 2011 she returned to California to play for new Women's Premier Soccer League (WPSL) franchise Orange County Waves. She scored six goals in nine regular season appearances as the team won the 2011 WPSL Championship.
In January 2012 Katrín agreed to join Philadelphia Independence of Women's Professional Soccer (WPS), but the league folded before the season started. Instead she returned to Kristianstads and played out the 2012 Damallsvenskan season, scoring four goals in 21 appearances.
In January 2013 Katrín signed for Liverpool Ladies, who had finished bottom of the FA WSL in 2011 and 2012 but were investing heavily in improving their team. She scored the second goal as Liverpool beat Bristol Academy 2–0 on the final day to secure the league title.
At UEFA Women's Euro 2009, Katrín played in two of the three group matches as Iceland were eliminated in the first round. National team coach Siggi Eyjólfsson also selected Katrín in his Iceland squad for UEFA Women's Euro 2013.
- Sport Person of the Year in Seltjarnarnes in 2007.