The Municipality of Nuevo Laredo is located in the Mexican state of Tamaulipas. Its municipal seat is Nuevo Laredo. The municipality contains more than 60 localities which the most important ones are Nuevo Laredo, El Campanario y Oradel, and Álvarez, the last two being suburbs of the city of Nuevo Laredo. By population, the municipality is the third largest in the state of Tamaulipas. The Nuevo Laredo municipality is the northernmost in Tamaulipas, lying at the extreme northwestern tip of its narrow strip of land along the Río Grande. The city of Nuevo Laredo contains approximately 97.5% of the total population of the municipality.

Tamaulipas, officially the Free and Sovereign State of Tamaulipas, is a state in Mexico; one of the 31 states which, along with Mexico City, comprise the 32 Federal Entities of Mexico. It is divided into 43 municipalities.