540 State Hwy. 16 Hwy is located in Goldthwaite, Texas, in Mills County. Mills County sits in the geographic heart of the Edwards Plateau, centered on Goldthwaite, a small ranching community that serves as a regional hub for the surrounding agricultural operations. The county maintains the character of working ranch Texas with minimal outside development influence.

The Colorado River forms the eastern boundary of Mills County, and the Pecan Bayou flows through the county to its confluence with the Colorado. The terrain features rolling limestone hills with live oak and cedar cover transitioning to the more open brush country of the western county.

Goldthwaite had an estimated population of 1,733 as of 2023. The 76844 zip code has a median household income of $67,037, a median home value of $184,000, and a median age of 49.6. The average household size is 2.3 people.

Cattle ranching, sheep and goat production, hunting leases, and pecan farming along the Colorado River bottom define the Mills County economy. The county offers affordable large-acreage working ranch land for buyers seeking productive agricultural operations in the central Hill Country.