Jaldhaka Upazila
Jaldhaka 
    জলঢাকা  | |
|---|---|
Dharmapaler Garh  | |
| Coordinates: 26°1′N 89°1.5′E / 26.017°N 89.0250°E | |
| Country | Bangladesh | 
| Division | Rangpur | 
| District | Nilphamari | 
| Area | |
 • Total  | 303.51 km2 (117.19 sq mi) | 
| Population  (2022)  | |
 • Total  | 386,801 | 
| • Density | 1,300/km2 (3,300/sq mi) | 
| Time zone | UTC+6 (BST) | 
| Postal code | 5330  | 
| Website | Official Map of Jaldhaka | 
Jaldhaka (Bengali: জলঢাকা, Joldhaaka, means covered under water) is an upazila of Nilphamari District in the Division of Rangpur, Bangladesh.