Katerini is a town in Central Macedonia, Greece, the capital of Pieria regional unit. It lies on the Pierian plain, between Mt. Olympus and the Thermaikos Gulf, at an altitude of 14 m. The town, which is one of the newest in Greece, has a population of 85,851 (according to the 2014 census). It is near the city of Thessaloniki, Greece's second largest city, which has been beneficial for Katerini's development over recent years. Katerini is accessible from the main Thessaloniki–Athens highway GR-1/E75 (with two interchanges near the town) and the Egnatia Odos to the north. It is served by both Intercity and local trains on the main railway line from Athens to Thessaloniki and there is a comprehensive regional and national bus service with its hub in the town.