Íþróttafélag Reykjavíkur (Icelandic pronunciation: [ˈiːˌθrouhtaˌfjɛːˌlaːɣ ˈreiːcaˌviːkʏr̥], lit.

'Reykjavik Sports Club'), commonly known as ÍR, is an Icelandic multi-sport club, based in the suburb of Breiðholt in Reykjavík.

It has teams in football, handball, basketball, athletics, tenpin bowling, skiing, karate, taekwondo and judo.

The ÍR men's basketball team has won the third most Icelandic championships, after KR and Njarðvík, with 15 titles.

It is also one of the most successful women's teams in the country, winning a total of 11 national championships.