| Official Name: | Rudsar |
| Native Name: | Persian: رودسر |
| Settlement Type: | City |
| Pushpin Map: | Iran |
| Subdivision Type: | Country |
| Subdivision Name: | Iran |
| Subdivision Type1: | Province |
| Subdivision Name1: | Gilan |
| Subdivision Type2: | County |
| Subdivision Name2: | Rudsar |
| Subdivision Type3: | District |
| Subdivision Name3: | Central |
| Population As Of: | 2016 |
| Population Total: | 37998 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Coordinates: | 37.1444°N 50.2936°W |
| Coordinates Footnotes: | [1] |
Rudsar (Persian: رودسر) is a city in the Central District of Rudsar County, Gilan province, Iran, serving as capital of both the county and the district.[2]
The word Rudsar comes from the word Rud, the Persian word for river, and sar, the Persian word for head, since Rudsar has rivers running along each side of the city.
According to valid historical documents, the ancient name of Roodsar was "Koutum", which was a small city in Rankooh. The other name of Roodsar was "Hoosem" that had a thriving bazaar and big mosque in the year 375 AH. Later on this city was ruined due to unknown reasons, and was reconstructed by Seyed Reza Kiya during the years 789-831 AH.
It was occupied by Russian forces along with the rest of northern Iran in the early 1900s.
At the time of the 2006 National Census, the city's population was 33,321 in 9,741 households.[3] The following census in 2011 counted 37,579 people in 11,903 households.[4] The 2016 census measured the population of the city as 37,998 people in 13,191 households.[5]
Rudsar is on the Caspian Sea, on a verdant coastal plain with a moderate climate, 326km (203miles) from Tehran.
Rudsar has a humid subtropical climate (Köppen: Cfa, Trewartha: Cf), with warm, humid summers and cool, damp winters.
The economy of the city is based on fishing and agriculture. The major products of Roudsar are rice, tea, citrus fruits, and silk.