Sumbe, formerly Novo Redondo, is a city located in west central Angola. It is the administrative capital of Cuanza Sul Province. In 2014 its population was 279,968.

Sumbe municipality stretches, North until the Queve river, West until the Balombo river, West limited by the Atlantic Ocean and East to the Conda Municipality.

The city has a dry tropical climate. The hottest temperatures are from January to April, and the coldest months are July and August.

Air transportation is serviced by Angola Air Services, SAL, and Inter Transit.