Mounton is a hamlet in Monmouthshire, south east Wales, United Kingdom, located two miles west of Chepstow in a rural setting.

The last owner, John Birt, closed the mills down in 1876 after being accused of polluting Mounton Brook.

[4] According to Fred Hando one of the mills produced the paper used for Bank of England notes,[5] but a monograph by the local historian Ivor Waters states that they "rarely made anything but brown and blue packing paper", using old rags, rope and straw as raw materials.

[4] Mounton House, now a special school for boys, was built as a country house in the Arts and Crafts style in 1914 by Henry Avray Tipping, a leading garden designer and writer, assisted by the local architect Eric Francis.

Robin Williams, coach to Great Britain's 2012 Olympic women's pairs rowing champions Helen Glover and Heather Stanning, is from Mounton.