The Roman Catholic Diocese of Benguela () is a diocese located in the city of Benguela in the ecclesiastical province of Huambo in Angola. The current bishop of the diocese is António Francisco Jaca.
The diocese was established on 6 June 1970 as Diocese of Benguela from the Diocese of Nova Lisboa (now the Archdiocese of Huambo). It was initially a suffragan of the Archdiocese of Luanda but became a suffragan of Huambo on 3 February 1977.
It enjoyed a papal visit by Pope John Paul II on 9 June 1992.
The diocese covers the entirety of Benguela Province. It has an area of 39,823 km<sup>2</sup> and is divided into 68 parishes.
The Cathedral of the diocese is Our Lady of Fatima Cathedral () in Benguela.