The Manjung District is a district in the southwestern part of the state of Perak, Malaysia. The district is well known for its Pangkor Island, a major attraction in Perak and the home of the Royal Malaysian Navy Lumut Naval Base and dockyard. Since the population is increasing, residential and commercial infrastructure is being developed. Dinding was once part of the British Straits Settlements colony.
Seri Manjung is the district's principal urban centre while smaller towns include Lumut town, Sitiawan town, Ayer Tawar, Pantai Remis and Beruas.