Masjid Jamek is one of the oldest mosques in Kuala Lumpur, Malaysia. It is located at the confluence of Klang and Gombak River and was designed by Arthur Benison Hubback. The then sultan of Selangor officially opened the mosque in 1909, two years after construction was completed. The mosque was built on the first Malay burial ground in the city.

The mosque has a Moorish architecture. Across the the Klang river stands the Sultan Abdul Samad Building, a building that was designed by the same architect and shares similar style.

Before the national mosque, Masjid Negara, was opened in 1965, Masjid Jamek served as Kuala Lumpur's main mosque.