Pwani Region is one of Tanzania's 30 administrative regions. The regional capital is the town of Kibaha. According to the 2012 national census, the region had a population of 1,098,668, which was slightly lower than the pre-census projection of 1,110,917. For 2002-2012, the region's 2.2 percent average annual population growth rate was the seventeenth highest in the country. It was also the 21st most densely populated region with 34 people per square kilometer. With a size of , the region is slightly larger than the state of Maryland in the United States.
The region is bordered to the north by the Tanga Region, to the east by the Dar es Salaam Region and the Indian Ocean, to the south by the Lindi Region, and to the west by the Morogoro Region. The word "pwani" in Kiswahili means "coast".