Yalova is a small city located in northwestern Turkey on the eastern coast of the Sea of Marmara. It is the seat of Yalova Province and Yalova District. The city has a population of over 250,000 with adjacent conurbation districts. A largely modern city, it is best known for the spa resort at nearby Termal, a popular summer retreat for residents of Istanbul.
Regular ferries connect Yalova with Istanbul via the Sea of Marmara. They are operated by İDO.
Yalova Province (Turkish: Yalova ili) is a province in northwestern Turkey, on the eastern coast of the Sea of Marmara. Its adjacent provinces are Bursa to the south and Kocaeli to the east. Its area is 798 km (making it the smallest province of Turkey), and its population is 296,333 (2022). Prior to 1930, the area around Yalova constituted a district of Kocaeli Province; from 1930 to 1995, it was part of Istanbul Province; in 1995, the area was separated and made into the current Yalova Province. The provincial capital is the city of Yalova.