Guerrero is a municipality located in the Mexican state of Tamaulipas. Towns and villages The largest localities (cities, towns, and villages) are: Adjacent municipalities and counties Mier Municipality - southeast and south Parás Municipality, Nuevo León - southwest Vallecillo Municipality, Nuevo León - southwest Anáhuac Municipality, Nuevo León - west Nuevo Laredo Municipality - northwest Webb County, Texas - northeast Zapata County, Texas - east Starr County, Texas - southeast References External links Gobierno Municipal de Guerrero Official website Municipalities of Tamaulipas