Volta Redonda (Portuguese pronunciation: [ˈvɔwtɐ ʁeˈdõdɐ]) is the name of a municipality in the Rio de Janeiro state of Brazil with an area of 182.81 km2, located from 350m to 707m above the sea level (22°31'23" S, 44°06'15" W) and with a population of 273,988 inhabitants (estimated in 2020).

Along with the municipalities of Barra Mansa and Pinheiral, it is a conurbation of over 500,000 inhabitants, according to the IBGE estimates for 2008, and the state's largest urban spot outside the metropolitan region of Rio de Janeiro.

With this, in 1875, the village of Santo Antonio de Volta Redonda started to have great impulse, but with the freedom of slaves in 1888, the decay of the Vale do Paraíba became visible, destroying the agriculture, which would never recover in a very satisfactory way.

Chosen as site for installing the Companhia Siderúrgica Nacional (CSN) steel mill in the middle of World War II, it marked the base of Brazilian industrialization.

Volta Redonda's mayor (Portuguese: prefeito) is currently Antônio Francisco Neto of the Progressistas party, elected in 2020 to serve a four-year term.