Peacehaven is a town and civil parish located in the Lewes district of East Sussex, England. It is situated above the chalk cliffs of the South Downs, approximately 6 miles (10 km) east of Brighton city centre along the A259 road.
The town is notable for being the location where the Greenwich Meridian crosses the English south coast. It sits adjacent to Telscombe Cliffs, which serves as a western extension to Peacehaven but exists within a separate parish and maintains its own distinct town council.