Mueang Pran was a city in the southern cities group of
Ayutthaya Kingdom. In 1906, King
Chulalongkorn (Rama V) merged Mueang Pran, Mueang Kamnoed Nopphakhun, and Mueang Prachuap to a new
Mueang Pran Buri, and determined the city hall to be at Tambon Ko Lak, now in
Mueang Prachuap Khiri Khan district. In 1915, to prevent confusion between the cities' names, King
Vajiravudh (Rama VI) changed the name of the province from Pran Buri to Prachuap Khiri Khan, as its center was at the same place as the former Mueang Prachuap. This also kept the name of the town and the Pran Buri River together. == Geography ==