Falmer Stadium, known for sponsorship purposes as the American Express Stadium and more commonly referred to as the Amex, is a football stadium in Falmer, Brighton and Hove, East Sussex. With a capacity of 31,876, it is the second largest stadium in all of South East England, and the 31st largest stadium in the United Kingdom. The largest in South East England is St. Mary's Stadium (Southampton) with about 800 seats more.

Falmer is a small village and civil parish in the Lewes District of East Sussex, England, lying between Brighton and Lewes, approximately five miles (8 km) north-east of the former. It is also the site of Brighton & Hove Albion's Falmer Stadium.