The Fastest-Growing Counties in the U.S.

The U.S. Census Bureau recently released the latest population growth data by counties. We’re breaking down the nuggets dentists, optometrists, physicians, and veterinarians need to know, so when searching for your medical office space, you can leverage demographic data to pinpoint your ideal patient base and find underserved areas with high growth.

  • Four of the top 10 counties with the largest numeric growth are in Texas: Harris, Collin, Tarrant, and Bexar counties. (Table 2)

  • Dallas-Fort Worth-Arlington had the largest numeric growth of metropolitan areas, with Houston-The Woodlands-Sugar Land in third and Austin-Round Rock in seventh. (Table 7)

  • Two of the 10 fastest-growing metro areas in percentage growth are in Midland and Odessa, Texas. (Table 8)

  • Comal, Kaufman, Midland, and Hood counties experienced the greatest percentage growth from 2017 to 2018. (Table 3)

  • Dallas-Fort Worth-Arlington and Houston-The Woodlands-Sugar Land are the fourth and fifth most populous metropolitan areas, respectively. (Table 6)

​“Migration, both domestic and international, as well as natural increase contributed to the growth in each of these areas, with natural increase serving as the largest source of population growth in Dallas,” as stated by the U.S. Census Bureau.

“One interesting trend we are seeing this year is that metro areas not among the most populous are ranked in the top 10 for population growth,” said Sandra Johnson, a demographer in the Census Bureau’s Population Division. “Though no new metro areas moved into the top 10 largest areas, Phoenix, Seattle, Austin, and Orlando all experienced numeric increases in population since 2010, rivaling growth in areas with much larger populations. This trend is consistent with the overall growth we are seeing in the south and the west.”


Among the 100 fastest-growing U.S. counties with 10,000 or more population, 27 of those are located in Texas.

3. Comal County, Texas

4. Kaufman County, Texas

7. Midland County, Texas

8. Hood County, Texas

13. Rockwall County, Texas

14. Hays County, Texas

18. Williamson County, Texas

20. Kendall County, Texas

22. Wise County, Texas

24. Waller County, Texas

31. Parker County, Texas

33. Collin County, Texas

34. Rains County, Texas

39. Ellis County, Texas

43. Montgomery County, Texas

48. Ector County, Texas

55. Liberty County, Texas

66. Denton County, Texas

67. Fort Bend County, Texas

68. Andrews County, Texas

74. Hunt County, Texas

79. Reeves County, Texas

81. Ward County, Texas

86. Bastrop County, Texas

88. Johnson County, Texas

89. Chambers County, Texas

92. Atascosa County, Texas


​​Ten Florida counties made the top 100 list.

6. Walton County, Florida

8. Osceola County, Florida

9. St. Johns County, Florida

25. Nassau County, Florida

41. Lake County, Florida

45. Polk County, Florida

52. Sumter County, Florida

54. Santa Rosa County, Florida

70. Pasco County, Florida

98. St. Lucie County, Florida

To learn how to analyze demographic data for medical and dental office spaces, register for our upcoming webinar, “How to Leverage Demographics to Identify a Practice Location.”

Download the 100 Fastest Growing U.S. Counties with 10,000 or More Population in 2017: July 1, 2017 to July 1, 2018