Ain Sinan (Arabic: عين سنان, romanized: ‘Ayn Sinān) is a village on the northern coast of Qatar, located in the municipality of Al Shamal.

Lorimer's Gazetteer of the Persian Gulf, Ain Sinan was described as a village 4 miles southwest of Fuwayrit which contained a fort with a 35 feet deep masonry well.

After the Al Maadeed abandoned the area, the fort was held by the Bu Kuwara tribe of Fuwayrit as a means to secure its water supply.

[9] Built in 1940, Ain Sinan Mosque is considered a local historic landmark and has undergone renovation by Qatar Museums.

[12] Therefore, Ain Sinan would establish a trade relationship with these villages in which it would receive sea goods such as fish and pearls in exchange for its potable water.