Johor (/dʒəˈhɔːr/), formerly known as Johore, is a state of Malaysia in the south of the Malay Peninsula. Johor has land borders with the Malaysian states of Pahang to the north and Malacca and Negeri Sembilan to the northwest. Johor shares maritime borders with Singapore to the south and Indonesia to both the west and east. Johor Bahru is the capital city and the economic centre of the state, Kota Iskandar is the seat of the state government, and Muar serves as the royal town of the state. The old state capital is Johor Lama. As of the 2015 census, the state's population is 3,553,600. Johor has highly diverse tropical rainforests and an equatorial climate. The state's mountain ranges form part of the Titiwangsa Range, which is part of the larger Tenasserim Range connected to Thailand and Myanmar, with Mount Ophir being the highest point in Johor.