- Ralls (Population: 2,252)
- Rancho Alegre (Population: 1,775)
- Rancho Viejo (Population: 1,754)
- Ranger (Population: 2,584)
- Ransom Canyon (Population: 1,011)
- Raymondville (Population: 9,733)
- Red Oak (Population: 4,301)
- Redwood (Population: 3,586)
- Refugio (Population: 2,941)
- Rendon (Population: 9,022)
- Reno (Population: 2,767)
- Richardson (Population: 91,802)
- Richland Hills (Population: 8,132)
- Richmond (Population: 11,081)
- Richwood (Population: 3,012)
- Rio Bravo (Population: 5,553)
- Rio Grande City (Population: 11,923)
- Rio Hondo (Population: 1,942)
- River Oaks (Population: 6,985)
- Roanoke (Population: 2,810)
- Robert Lee (Population: 1,171)
- Robinson (Population: 7,845)
- Robstown (Population: 12,727)
- Rockdale (Population: 5,439)
- Rockport (Population: 7,385)
- Rocksprings (Population: 1,285)
- Rockwall (Population: 17,976)
- Rogers (Population: 1,117)
- Rollingwood (Population: 1,403)
- Roma (Population: 9,617)
- Roman Forest (Population: 1,279)
- Roscoe (Population: 1,378)
- Rosebud (Population: 1,493)
- Rosenberg (Population: 24,043)
- Rosita North (Population: 3,400)
- Rosita South (Population: 2,574)
- Rotan (Population: 1,611)
- Round Rock (Population: 61,136)
- Rowlett (Population: 44,503)
- Royse City (Population: 2,957)
- Runaway Bay (Population: 1,104)
- Runge (Population: 1,080)
- Rusk (Population: 5,085)
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