Ain Jannah (Arabic: عين جنا‎) is a city in northwestern Jordan, located in the Ajlun Governorate. It is part of the Ajlun region.

Geographic location
The city is located in the eastern part of the governorate, west of the Jebel Ajloun range, approximately 33 kilometers (in a straight line) north-north-west (NNW) from the capital, Amman. The absolute height is 1063 meters above sea level.

Population
According to the official 2015 census, the population was 12,490 (6,320 males and 6,170 females). There were 2529 households in the city.

Transport
The national highway No. 55 (Irbid – Ajlun) passes through the city. The nearest airport is located in the city of Amman.