This is a list of the National Register of Historic Places listings in Lamar County, Texas.
This is intended to be a complete list of properties and districts listed on the National Register of Historic Places in Lamar County, Texas. There are three districts and 38 individual properties listed on the National Register in the county. One individually listed property is also designated a State Historic Site, a State Antiquities Landmark (SAL), a Recorded Texas Historic Landmark (RTHL), and is part of a historic district that contains additional RTHLs. Five individually listed properties are also RTHLs, and another district contains more SALs and RTHLs.
The publicly disclosed locations of National Register properties and districts may be seen in a mapping service provided.