| Agency Name: | Water Supply and Sewerage Authority |
| Native Name A: | পানি সরবরাহ ও পয়ঃনিষ্কাশন কর্তৃপক্ষ |
| Native Name R: | Pāni sarabarāha ō paẏaḥniṣkāśana Kartr̥pakṣa |
| Seal: | Government Seal of Bangladesh.svg |
| Jurisdiction: | Government of Bangladesh |
| Headquarters: | Dhaka, Bangladesh |
| Parent Department: | Ministry of Local Government, Rural Development and Co-operatives |
| Parent Agency: | Government of Bangladesh |
| Child1 Agency: | Dhaka WASA |
| Child2 Agency: | Chattogram WASA |
| Child3 Agency: | Khulna WASA |
| Child4 Agency: | Rajshahi WASA |
Water Supply and Sewerage Authority or WASA is the main body administering Water supply, Drainage and Sanitation system in Bangladesh.[1] It was established in the year 1963 as an independent organization, under the East Pakistan ordinance XIX. At present WASA operates according to the WASA act 1996.[2]