What Is the Largest Mosque in the World?

The largest mosque in the world is the Masjid al-Haram, also known as the Grand Mosque, located in Mecca, Saudi Arabia. It surrounds the Kaaba, which is the most sacred site in Islam and is the destination of the annual Hajj pilgrimage. The mosque was expanded several times in the last century to accommodate the increasing number of Muslims performing Hajj and Umrah. As of 2021, the mosque has a capacity of over 1.5 million people, with indoor and outdoor prayer spaces covering an area of 356,800 square meters (3,841,600 square feet). The mosque also contains several other important Islamic sites, including the well of Zamzam, the hill of Safa and Marwah, and the station of Ibrahim.