Location of mouth
|State||Bihar, Jharkhand, West Bengal|
|Cities||Deoghar, Jamtara, Bolpur, Katwa|
|• location||Jamui, Bihar|
|Length||288 km (179 mi)|
|• location||Bhagirathi River|
|• right||Pathro and Jayanti in Jharkhand, Tumuni and Kunur in Bardhaman district of West Bengal|
Ajay (/ˈədʒɑɪ/) is a river which flows through the Indian states of Bihar, Jharkhand and West Bengal. The catchment area of Ajay River is 6,000 square kilometres (2,300 sq mi).