Margam Castle, Margam, Port Talbot, Wales, is a late Georgian country house built for Christopher Rice Mansel Talbot. Designed by Thomas Hopper, the castle was constructed in a Tudor Revival style over a five-year period, from 1830 to 1835. The site had been occupied for some 4,000 years. A Grade I listed building, the castle is now in the care of Neath Port Talbot County Borough Council.

Margam is a suburb and community of Port Talbot in the Welsh county borough of Neath Port Talbot, Wales, close to junction 39 of the M4 motorway. The community had a population of 3,017 in 2011; the built up area being larger and extending into Taibach community.