Station, Meriti, then belonging to the municipality of Nova Iguacu. December 31, 1943, through Decree-Law 1055, raised to the category of municipality receiving the name of Duque de Caxias. Already the district of Duque de Caxias was created by Decree-Law No. 1056 on the same day, month and year.
With emancipation, the council received great encouragement in its economy. Several people, mainly from the Northeast of Brazil, came to Rio in search of work and established residence in Duque de Caxias.
The Executive was officially installed on January 1, 1944, when the federal intervenor Ernani do Amaral Peixoto appointed to meet at the time of the municipal accounting Homero Lara. Other nine persons were subsequently appointed to the same office.
The first was elected mayor of Glicerio Gastao Gouveia Reis, who administered the city from September 1947 to December 1950. After him came also, by direct vote, respectively Braulino Reis de Matos, Francisco Correa, Adolpho David, Joaquin Tenorio Cavalcante and Moacir Rodrigues do Carmo.
The elections were interrupted with decretacao of Duque de Caxias and National Security Area by the military regime in 1971 and took office the mayor Estácio Francisco da Silva. From there, sometimes against the wishes of the political and popular leaders of the region, mayors were elected by the military dictatorship called the General Marciano Carlos de Medeiros, the colonels Renato Moreira da Fonseca, Americo Gomes de Barros Filho and former Deputy Hydekel de Freitas Lima.
The city won, after much movement of political leaders, business, unions and community, its autonomy in 1985 and was elected that year onwards Juberlan de Oliveira, Hydekel Lima de Freitas (in 1990 left the post to take a seat on Senate), Jose Carlos Lacerda (vice mayor of Hydekel, took office after his resignation), Moacyr Rodrigues do Carmo, Jose Camilo Zito dos Santos Filho and Washington Reis de Oliveira, and the last returned to
