The Sedibeng District Municipality (Sotho: Masepala wa Setereke wa Sedibeng; Zulu: UMasipala wesiFunda sase Sedibeng; Afrikaans: Sedibeng-distriktsmunisipaliteit) is one of the districts of the Gauteng province of South Africa. The administrative seat of the district is Vereeniging. As of 2011, the most widely spoken language among its 794,605 inhabitants was Sesotho.

The total population of Sedibeng accounts for only 9% of the total Gauteng population of 8.84 million. This means that in 2001 Sedibengs's population was approximately 794 600 (Stats SA, 2001 CENSUS). The growth rate for Gauteng was 3.75% p.a and 2% p.a for Sedibeng during 2003 (Stats SA). In terms of the economy the district is dominated by manufacturing, which contributed roughly 32% to the local economy during 2001. Manufacturing in the district is dominated by the fabricated metal and the chemical sectors (Mittal Steel Company (previously ISCOR) and Sasol. The local economy has been stagnating for a number of years, with a net loss in formal job opportunities. Economic sectors which do present opportunities for further local development and economic growth include agriculture and tourism.^{[citation needed]}

Some of Sedibeng's natural resources are:

• The Vaal River. At times however, the river is polluted by untreated sewage from this municipality.^[4]
• Vaal Dam, a tourist attraction and source of water even beyond the boundaries of Sedibeng
• Suikerbosrand Nature Reserve, a protected area in the Suikerbosrand Range
• Aquifers, which are an important source of water in rural areas

In 2020 the Department of Cooperative Governance (DCoG) decided to act against council members who in 2018 approved a large raise in salary for their municipal manager Stanley Khanyile. In 2020 Khanyile was shot and killed in Meyersdal, Alberton,^[5] before he could appear on charges of fraud, theft and money laundering stemming from his term as the head of a department in the Eastern Cape.

In March 2024, facing a financial crisis, the council increased its capital budget by R700,000 to purchase a luxury car for the mayor, Lerato Maloka.^[6]

Sedibeng District Municipality consists of the three local municipalities, namely Lesedi, Midvaal and Emfuleni. The total number of households in Sedibeng is estimated at 224 307.

The following statistics are from the 2001 census.