City Houston delaware zip code Houston delaware zip code list include total of 1 zip code which is listed below. Houston is a city in Kent County, Delaware, United States. It is part of the Dover, Delaware Metropolitan Statistical Area. Zip CodeCountyState19954KentDelaware Tweet Share Pin it You May Also Like Tamuning guam zip code Yigo Guam zip code Agat Guam zip code Mangilao zip code Agana Heights zip code Inarajan zip code Post navigation Next ArticlePrevious Article