Every number one of 2020

1. 1 All I Want for Christmas Is You Mariah Carey Jan 4 · 1 week (3 in a row)
2. 2 Circles Post Malone Jan 11 · 1 week
3. 3 The Box Roddy Ricch Jan 18 to Mar 28 · 11 weeks
4. 4 Blinding Lights The Weeknd Apr 4 to Apr 11 · 2 weeks
5. 5 Toosie Slide Drake Apr 18 · 1 week
6. 6 Blinding Lights The Weeknd Apr 25 to May 2 · 2 weeks
7. 7 Search ↗ The Scotts The Scotts, Travis Scott and Kid Cudi May 9 · 1 week
8. 8 Say So Doja Cat featuring Nicki Minaj May 16 · 1 week
9. 9 Search ↗ Stuck with U Ariana Grande and Justin Bieber May 23 · 1 week
10. 10 Savage Megan Thee Stallion featuring Beyoncé May 30 · 1 week
11. 11 Search ↗ Rain on Me Lady Gaga and Ariana Grande Jun 6 · 1 week
12. 12 Rockstar DaBaby featuring Roddy Ricch Jun 13 to Jun 20 · 2 weeks
13. 13 Search ↗ Trollz 6ix9ine and Nicki Minaj Jun 27 · 1 week
14. 14 Rockstar DaBaby featuring Roddy Ricch Jul 4 to Aug 1 · 5 weeks
15. 15 Search ↗ Cardigan Taylor Swift Aug 8 · 1 week
16. 16 Watermelon Sugar Harry Styles Aug 15 · 1 week
17. 17 WAP Cardi B featuring Megan Thee Stallion Aug 22 to Aug 29 · 2 weeks
18. 18 Dynamite BTS Sep 5 to Sep 12 · 2 weeks
19. 19 WAP Cardi B featuring Megan Thee Stallion Sep 19 to Sep 26 · 2 weeks
20. 20 Dynamite BTS Oct 3 · 1 week
21. 21 Search ↗ Franchise Travis Scott featuring Young Thug and M.I.A. Oct 10 · 1 week
22. 22 Search ↗ Savage Love (Laxed – Siren Beat) Jawsh 685, Jason Derulo and BTS Oct 17 · 1 week
23. 23 Mood 24kGoldn featuring Iann Dior Oct 24 to Oct 31 · 2 weeks
24. 24 Positions Ariana Grande Nov 7 · 1 week
25. 25 Mood 24kGoldn featuring Iann Dior Nov 14 to Nov 28 · 3 weeks
26. 26 Search ↗ Life Goes On BTS Dec 5 · 1 week
27. 27 Mood 24kGoldn featuring Iann Dior Dec 12 · 1 week
28. 28 All I Want for Christmas Is You Mariah Carey Dec 19 · 1 week
29. 29 Search ↗ Willow Taylor Swift Dec 26 · 1 week

The numbers beside each song count the year's number ones in order. Weeks are counted from the Billboard Hot 100 charts dated in 2020.