| Official Name: | Dobrosin |
| Native Name: | Добросин |
| Native Name Lang: | sr |
| Settlement Type: | Village |
| Pushpin Map: | Serbia |
| Pushpin Label Position: | right |
| Subdivision Type: | Country |
| Subdivision Name: |  Serbia |
| Subdivision Type1: | District |
| Subdivision Name1: | Pčinja District |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Bujanovac |
| Unit Pref: | Metric |
| Area Footnotes: | [1] |
| Area Total Km2: | 8.57 |
| Population As Of: | 2002 |
| Population Total: | 747 |
| Population Density Km2: | auto |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Coordinates: | 42.4494°N 21.6361°W |
| Elevation M: | 677 |
Dobrosin (Serbian: Добросин, Albanian: Dobrosin) is a village located in the municipality of Bujanovac, southern Serbia.
The village is located on the administrative border with Kosovo, some 16 kilometres from Bujanovac.[2]
After the Kosovo War (1998–99), a demilitarized zone was established between Kosovo (governed by United Nations) and inner Serbia and Montenegro, which included Dobrosin. The Liberation Army of Preševo, Medveđa and Bujanovac, an ethnic Albanian terrorist organization, was formed in the village in early January 2000.[2] It sought the unification of Albanian-inhabited Preševo Valley with Kosovo, leading an insurgency between 12 June 1999–1 June 2001.
In 2012, three attacks were made on the Serbian border police station at Dobrosin.[2]
The village is inhabited by a majority of ethnic Albanians. In 1991 census, the settlement had a population of 1,029 people. In 2002 census, the settlement had a population of 747 people. Of these, 719 (96,25 %) were ethnic Albanians, and 27 (3,61 %) others.[3]