Rokan Hilir Regency
| Rokan Hilir Regency Kabupaten Rokan Hilir | |
|---|---|
| Regency office of Rokan Hilir Regency in Bagansiapiapi | |
| Country | Indonesia | 
| Province | Riau | 
| Regency seat | Bagansiapiapi | 
| Government | |
| • Regent | Bistamam | 
| • Vice Regent | Jhony Charles | 
| Area | |
|  • Total | 9,068.63 km2 (3,501.42 sq mi) | 
| Population  (mid 2024 estimate) | |
|  • Total | 688,073 | 
| • Density | 76/km2 (200/sq mi) | 
| Time zone | UTC+7 (WIB) | 
| Website | rohikab.go.id | 
Rokan Hilir ("Lower Rokan") is a regency (kabupaten) of Riau Province, on Sumatra island, Indonesia. It was formed on 4 October 1999 from districts which had previously been the northwestern part of Bengkalis Regency. It occupies the lower part of the catchment area of the Rokan River, and has an area of 9,068.63 km2. It had a population of 553,216 at the 2010 census and 637,161 at the 2020 census; the official estimate as at mid 2024 was 688,073 (comprising 352,235 males and 335,838 females).> The administrative centre of the Rokan Hilir Regency is located at the town of Bagansiapiapi.