Tanzania is divided into thirty regions. In 1975 there were twenty-five regions in Tanzania. In 2002 one region changed its name, Ziwa Magharibi Region (West Lake Region) became Kagera Region. In 2003 Manyara Region was created out of part of Arusha Region. In 2012 four more regions were created: Geita, Katavi, Njombe and Simiyu.