Sultan Abdul Samad Mosque, Islamic place of worship in Sepang District, Selangor, Malaysia.

Sultan Abdul Samad Mosque is a mosque in Sepang District, Selangor, Malaysia, near Kuala Lumpur International Airport. Its design follows the Classical Arab architectural style, with domes and a flat roof, while the floor plan follows the local Malay style, particularly in the courtyard area. It spans 17.96 acres (7.27 ha) and can accommodate 8,000 congregants.

Construction began in August 1997 and was completed in 1999, ahead of the airport's opening; the mosque was officially opened on 25 August 2000 by Tengku Idris Shah, then Regent of Selangor and now Sultan Sharafuddin Idris Shah. It was first known as KLIA Mosque and was later named after Sultan Abdul Samad, the fourth Sultan of Selangor.

The mosque is named after Sultan Abdul Samad, the fourth Sultan of Selangor, born in 1804 and ruler from 1857 until his death on 6 February 1898. It serves travellers arriving at and departing from KLIA as well as Muslims from Salak Tinggi and the KLIA Town Centre. The floor plan follows local Malay practice, notably in the courtyard.

The mosque sits right next to the airport and can be reached on foot from the terminal or by local transport. Visitors should bring modest clothing and be mindful of prayer times before entering the prayer areas.

The mosque was built to serve the opening of Kuala Lumpur International Airport and was first called KLIA Mosque; it was only later named after Sultan Abdul Samad, the fourth Sultan of Selangor. Its 17.96-acre site can hold 8,000 worshippers, and it also serves travellers arriving at and leaving from the airport.