Knattspyrnufélagið Ægir (Icelandic pronunciation: [ˈkʰnahtˌspɪ(r)tnʏˌfjɛːˌlaijɪð ˈaiːjɪr̥], lit. 'Ægir Football Club') is a professional Icelandic sports club from the town of Þorlákshöfn, mainly known for its football team. The club has a football team playing in 2.Deild Karla after being relegated from the Lengjudeild Karla in 2023.