Lists of mosques cover mosques, places of worship for Muslims. The lists include the most famous, largest and oldest mosques, and mosques mentioned in the Quran, as well as lists of mosques in each region and country of the world. The major regions, Africa, Americas, Asia, Europe and Oceania are sorted alphabetically. The sub-regions, such as Northeast and Northwest Africa in Africa, and Arabia and South Asia in Asia, are sorted by the dates in which their first mosques were reportedly established, more or less, barring those that are mentioned by name in the Quran.

Masjid al-Haram, also known as the Sacred Mosque or the Great Mosque of Mecca, is considered to be the most significant mosque in Islam. It encloses the vicinity of the Kaaba in Mecca, in the Mecca Province of Saudi Arabia. It is among the pilgrimage sites associated with the Hajj, which every Muslim must perform at least once in their lives if able. It is also the main site for the performance of ʿUmrah, the lesser pilgrimage that can be undertaken any time of the year. The rites of both pilgrimages include circumambulating the Kaaba within the mosque. The Great Mosque includes other important significant sites, such as the Black Stone, the Zamzam Well, Maqam Ibrahim, and the hills of Safa and Marwa.