Ciudad Madero is a coastal city located on the Gulf of Mexico in the southeastern part of the Mexican state of Tamaulipas. Lying within the metropolitan area of Tampico, it is the seventh most populous city in the state, with a census-estimated 2015 population of 209,175 within an area of 18.0 square miles (46.6 km) the city is the third-largest in the Tampico metropolitan area. It is also an important center for oil refining.

On 1 May 1924, the provisional governor, Candelario Garza, officially declared Madero a municipality.

Ciudad Madero has a beach named "Playa Miramar", which, in recent years, has been expanding its services with new hotels and restaurants. Near the beach there is a lighthouse, named "Faro de Ciudad Madero" – although this has been replaced by a red beacon light atop a small tower, to guide approaching ships in to the channel of the Río Pánuco. However, in October 2006, the Ciudad Madero Planning Commission signaled its intention to build a new lighthouse because of the cultural and tourist values it would provide.

At the Santa Cruz Church [fr] the roof collapsed during a baptism ceremony on 1 October 2023. Ten people were killed and over 60 were injured.

• Link to tables of population data from Census of 2005 INEGI: Instituto Nacional de Estadística, Geografía e Informática
• Tamaulipas Enciclopedia de los Municipios de México

• Ayuntamiento de Ciudad Madero Official website