| Official Name: | Retkocer |
| Native Name: | Реткоцер |
| Native Name Lang: | sr |
| Settlement Type: | Village |
| Pushpin Map: | Serbia |
| Pushpin Label Position: | bottom |
| Subdivision Type: | Country |
| Subdivision Name: |  Serbia |
| Subdivision Type1: | District |
| Subdivision Name1: | Jablanica District |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Medveđa |
| Unit Pref: | Imperial |
| Population As Of: | 2002 |
| Population Total: | 96 |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Coordinates: | 42.8342°N 21.52°W |
Retkocer (Serbian: Реткоцер) is a village in the municipality of Medveđa, Serbia. According to the 2002 census, the village has a population of 96 people.[1] Dušan Spasojević (Cyrillic: Душан Спасојевић; 10 July 1968 – 27 March 2003), known by the nicknames Duća and Šiptar, was the head of one of the largest Serbian criminal groups on record, the Zemun Clan. He was born and from Retkocer.