Jamek Mosque, officially Sultan Abdul Samad Jamek Mosque (Malay: Masjid Jamek Sultan Abdul Samad, Jawi: مسجد جامع سلطان عبدالصمد), is one of the oldest mosques in Kuala Lumpur, Malaysia. It is located at the confluence of the Klang and Gombak River and may be accessed via Jalan Tun Perak. The mosque was designed by Arthur Benison Hubback, and built in 1909.

The name "Jamek" is the Malay equivalent of the Arabic word (جامع) meaning a place where people congregate to worship. It is also referred to as "Friday Mosque" by the locals.