It was located in the province of Western Finland and was part of the Satakunta region. The municipality had a population of 3,236 (2003) and covered an area of 213.27 km² of which 7.24 km² is water. The population density was 15.2 inhabitants per km².
Lappi was consolidated with the city of Rauma on 1 January 2009, was officially disbanded and since has been considered a neighborhood.
Media related to Lappi at Wikimedia Commons