Castellón capital of the Flat one; Independent community Valencian Community; Spanish and Valencian official language; Total surface Lugar nº 38 6,679 km ²; % of Spain 1.32%%; Total population (2005) 543.432; % of Spain 1.32%; Lugar density nº 28 81.36 hab. /km ²; Castellonense Gentilicio. Castellón is one of the 50 provinces in which Spain is divided administratively, and is located in the most northern part of the Valencian Community. Its capital is Castellón of the Flat one (167,455 hab.). Hab has a population of 543,432. (2005). Located to the east of the Iberian Peninsula, it limits with the Mediterranean Sea the east, and with the provinces from Tarragona to the northeast, Teruel to the west and Valencia to the south. One is the second more mountainous province of Spain, and its coast receives the tourist name of Coast of the Orange blossom.