, also spelled as Johore
, is a state of Malaysia in the south of the Malay Peninsula. Johor has land borders with the Malaysian states of Pahang and Malacca to the north 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 capital of the state. Johor Lama served as the old state capital during the period of the Johor Sultanate. As of 2020, the state's population is 4.01 million, making it the second most populated state in Malaysia. Johor has highly diverse tropical rainforests and an equatorial climate. Situated at the southern foothills of the Tenasserim Hills,
inselbergs and massifs dominate the state's flat landscape, with Mount Ledang being the highest point. Johor Bahru is one of the anchor cities of the Iskandar Malaysia development corridor, which is one of the most densely populated and fastest-growing urban areas in Malaysia.