[1] The Kalambo River flows through the district and its mouth on Lake Tanganyika is about 15 km (9.3 mi) south of the town of Kasanga.

[3] Moshi Chang'a was the first District Commissioner,[4] who served until his death in an auto accident in April 2014.

[5] According to the 2022 Tanzania National Census, the population of Igunga District was 316,783 in 2022.

[6] Most people are employed in herding and subsistence farming.

The major cash crops are maize, sunflowers, beans, cassava and honey.

[4] Some people are employed in artisanal mining and traditional fishing.

[7] For parliamentary elections, Tanzania is divided into constituencies.

Mambwe Nkoswe Kalambo District is administratively divided into 23 wards:[9] 1.