The best-selling country musicians of all time

• The best-selling country artists of all time include Elvis Presley, Tim McGraw, and Shania Twain.
• We used the RIAA's data to compile this list based on total album units sold in the US.
• Four artists on this list debuted this century: Carrie Underwood, Taylor Swift, Luke Bryan, and Morgan Wallen.

Did you know two of the top three best-selling musicians of all time are country music artists?

Garth Brooks recently overtook the Beatles as the artist with the highest album sales of all time, and Elvis Presley is right there at No. 3.

Country music is one of the most popular genres, with its own set of stars, award shows, and a hall of fame.

We used the Recording Industry Association of America's (RIAA) list of best-selling artists, ranked by albums sold, to pick out the top 25 most successful country musicians of all time.

To qualify as a country star, a musician's output had to primarily appear on country charts, or the artist had to be inducted into the Country Music Hall of Fame, nominated in the country genre at the Grammys, or have received nominations at country award shows like the CMAs or the ACM Awards.

Here's who made the cut, from No. 25 to No. 1.

25. Luke Bryan — 20 million units

24. Brooks & Dunn — 21.5 million units

23. Carrie Underwood — 22.5 million units

22. Jimmy Buffett — 23 million units

20 (tie). Kid Rock — 23.5 million units

20 (tie). Johnny Cash — 23.5 million units

19. Vince Gill — 24 million units

17 (tie). Toby Keith — 25.5 million units

17 (tie). Faith Hill — 25.5 million units

16. Morgan Wallen — 26 million units

15. Linda Ronstadt — 30 million units

14. Willie Nelson — 31.5 million units

13. The Chicks — 33 million units

12. John Denver — 33.5 million units

11. Kenny Chesney — 37 million units

9 (tie). Tim McGraw — 41 million units

9 (tie). Reba McEntire — 41 million units

8. Alan Jackson — 44.5 million units

7. Kenny Rogers — 47.5 million units

6. Shania Twain — 48 million units

5. Alabama — 49 million units

4. George Strait — 69.5 million units

3. Taylor Swift — 110 million units

2. Elvis Presley — 146.5 million units

1. Garth Brooks — 200 million units