Milan is a village in Cibola County, New Mexico, United States. The population was 3,245 at the 2010 census. A suburb of Grants, Milan's population grew by over 1,300 between 2000 and 2010, a rate of 71.6%. Many new houses and service-oriented businesses are being built. Milan is the site of the privately run Cibola County Correctional Center, whi…Milan is a village in Cibola County, New Mexico, United States. The population was 3,245 at the 2010 census. A suburb of Grants, Milan's population grew by over 1,300 between 2000 and 2010, a rate of 71.6%. Many new houses and service-oriented businesses are being built. Milan is the site of the privately run Cibola County Correctional Center, which houses more than 1,000 federal prisoners and is a major employer.