Runosmäki (Swedish Runosbacken) is a district and a suburb of the city of Turku, Finland, located approximately six kilometres to the north of the city centre.
It is the largest district in the city, with a population of 10,296 (as of 2004[update]).
However, the area of the district also includes the nearby suburb of Länsinummi in addition to Runosmäki proper, which has a population of about 8,200 and thus it is only the second-largest suburb of Turku, after Varissuo.
The district's linguistic makeup is 91.82% Finnish, 1.60% Swedish, and 6.58% other.
The services in the suburb include several schools, a library, a health centre, sports facilities and an old people's home.