The fixture between AIK and Hammarby is a local derby in Stockholm, Sweden.

The clubs first met in a competitive game in 1920.

The rivalry between AIK and Hammarby is one of the most important derbies in Sweden. AIK and Hammarby are clubs with considerable support in Sweden; in 2015, two of the games between these two teams had an attendance of 41 063^[2] and 41 630^[3] respectively. 23 of September 2018 a derby between these two teams had an attendance of 49,034. It's still the record for a derby in the Nordic countries.

AIK was founded in the district of Norrmalm, which constitutes the most central part of Stockholm City Centre, and therefore have a following in the northern parts of the city centre, as well as a strong concentration of fans in the northwest, roughly along the blue line of the Metro. Hammarby consider Södermalm, the southern district of the city centre where the club was founded, and the boroughs south of said district, their heartland. (Both clubs also maintain a cross-town rivalry with Djurgårdens IF, who counts the Östermalm district, the eastern part of the city centre, as their stronghold.)

• Local derby
• Djurgårdens IF–Hammarby IF rivalry
• Tvillingderbyt