Jarun is a neighbourhood in the southwestern part of Zagreb, Croatia. It was named after the Jarun lake formed by Sava river, now located on the southern edge of the neighbourhood.

The lake is the location of a sport and leisure center "Jarun" where people can row, paddle, sail, surf, swimm, jog, bike, rollerskating, skate-boarding... Around the lake there are many night clubs and cafes.

The development of Jarun began at the end of 1970s when it was merely a village with building of apartment blocks, and especially in 1987 due to the building of the sport and leisure center (because of the Universiade in Zagreb the same year). It is presently a middle-class neighbourhood with a very low crime rate.

The borders of Jarun are Horvaćanska street on the north with Staglišće, Hrvatski sokol street with Vrbani on the west, Vrapčak with Gredice on the east and river Sava on the south. Jarun in wider sense also includes neighbourhoods of Staglišće and Gredice.