Ómarsdóttir () is an Icelandic patronym. Notable people with the surname include:
Iris Ómarsdóttir (born 2003), Norwegian footballer of Icelandic descent Katrín Ómarsdóttir (born 1987), Icelandic footballer Kristín Ómarsdóttir (born 1962), Icelandic author, poet, playwright, and visual artist Silja Bára Ómarsdóttir (born 1971), Icelandic political scientist and professor of international relations, at the University of Iceland