Ruvuma Region is one of Tanzania's 30 administrative regions. The regional capital is the municipality of Songea. According to the 2012 national census, the region had a population of 1,376,891, which was lower than the pre-census projection of 1,449,830. For 2002-2012, the region's 2.1 percent average annual population growth rate was the twentieth highest in the country. It was also the 28th most densely populated region with 22 people per square kilometer.
The region is named after the Ruvuma River, which forms most of its southern boundary with Mozambique. The region is also bordered to the north by the Morogoro Region, to the northeast by the Lindi Region, to the east by the Mtwara Region, and to the northwest by the Iringa Region. Ruvuma has many different tribes, such as the Mpoto.
The regional commissioner of the Ruvuma Region is Said Thabit Mwambungu.