title: National Register of Historic Places listings in Mason County, Texas
text: # National Register of Historic Places listings in Mason County, Texas
  
  This is a list of the National Register of Historic Places listings in Mason County, Texas.
  
  This is intended to be a complete list of properties and districts listed on the National Register of Historic Places in Mason County, Texas. There are one district and three individual properties listed on the National Register in the county. The district contains one individually listed property, one State Antiquities Landmark and several Recorded Texas Historic Landmarks.
  
  This National Park Service list is complete through NPS recent listings posted July 21, 2023.
  
  ## Current listings
  
  The locations of National Register properties and districts may be seen in a mapping service provided.
  
  | | Name on the Register | Image | Date listed | Location | City or town | Description |
  | - | - | - | - | - | - | - |
  | 1 | Heinrich and Fredericka Hasse House | Heinrich and Fredericka Hasse House | March 14, 1990 (#90000336) | TX 29, W of Art 30°44′21″N 99°07′16″W﻿ / ﻿30.739167°N 99.121111°W﻿ / 30.739167; -99.121111﻿ (Heinrich and Fredericka Hasse House) | Art | |
  | 2 | Mason Historic District | Mason Historic District More images | September 17, 1974 (#74002086) | Irregular pattern along both sides of U.S. 87 and TX 29 30°44′56″N 99°13′27″W﻿ / ﻿30.748889°N 99.224167°W﻿ / 30.748889; -99.224167﻿ (Mason Historic District) | Mason | Boundary increase on Oct. 16, 1991 (#91001526); includes State Antiquities Landmark and numerous Recorded Texas Historic Landmarks |
  | 3 | Reynolds-Seaquist House | Reynolds-Seaquist House | November 20, 1974 (#74002087) | 400 Broad St. 30°45′05″N 99°13′54″W﻿ / ﻿30.751389°N 99.231667°W﻿ / 30.751389; -99.231667﻿ (Reynolds-Seaquist House) | Mason | Recorded Texas Historic Landmark; part of Mason Historic District |
  | 4 | State Highway 9 Bridge at the Llano River | State Highway 9 Bridge at the Llano River | October 10, 1996 (#96001128) | US 87, 10 mi (16 km). S of TX 29 30°39′40″N 99°06′34″W﻿ / ﻿30.661111°N 99.109444°W﻿ / 30.661111; -99.109444﻿ (State Highway 9 Bridge at the Llano River) | Mason | |
  