National Register of Historic Places listings in Alamosa County, Colorado  This is a list of the National Register of Historic Places listings in Alamosa County, Colorado. This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Alamosa County, Colorado, United States. The locations of National Register properties and districts for which the latitude and longitude coordinates are included below, may be seen in a map. There are 15 properties and districts listed on the National Register in the county.