# List of Billboard Hot 100 number ones of 2019

The Billboard Hot 100 is a chart that ranks the best-performing songs in the United States. Its data, published by Billboard magazine and compiled by Nielsen SoundScan, is based collectively on each song's weekly physical and digital sales, as well as the amount of airplay received on American radio stations and streaming on online digital music outlets.
During 2019, fifteen singles reached number one on the Hot 100; a sixteenth single, "Thank U, Next" by Ariana Grande, began its run at number one in November 2018. Of those fifteen number-one singles, four were collaborations. In total, eighteen acts topped the chart as either lead or featured artists, with ten—Swae Lee (as a solo artist), Bradley Cooper, Jonas Brothers, Lil Nas X, Billy Ray Cyrus, Billie Eilish, Shawn Mendes, Lizzo, Lewis Capaldi, and Selena Gomez—achieving their first Hot 100 number-one single.
Lil Nas X's "Old Town Road" was the longest-running number-one of the year, leading the chart for nineteen weeks (one for the song's original version, credited solely to Lil Nas X, and eighteen for a remix featuring Billy Ray Cyrus); in doing so, it broke the record as the longest-running number one single in Billboard history - a record previously held by the sixteen-week runs of both "One Sweet Day" by Mariah Carey (who added a nineteenth number one single in 2019) and Boyz II Men (1995–96), and "Despacito" by Luis Fonsi and Daddy Yankee featuring Justin Bieber (2017). It also topped the Billboard Year-End Hot 100 ranking as the best-performing single of 2019. In December, Mariah Carey's "All I Want for Christmas Is You" hit number one for the first time 25 years after its debut in 1994, breaking the record for longest climb to the top spot of the Hot 100 since release. It became her 19th number-one single, extending her own record for most number ones among soloists on the Hot 100. It was also the first Christmas song to top the Hot 100 since "The Chipmunk Song" by David Seville and the Chipmunks in 1958–59. Post Malone and Ariana Grande were the only acts to have multiple number-one songs in 2019, with two apiece.

## Chart history

Key :
| † | Indicates best-performing song of 2019 |
| No. | Issue date | Song | Artist(s) |
| re | January 5 | "Thank U, Next" | Ariana Grande |
| 1081 | January 12 | "Without Me" | Halsey |
| 1082 | January 19 | "Sunflower" | Post Malone and Swae Lee |
| re | January 26 | "Without Me" | Halsey |
| 1083 | February 2 | "7 Rings" | Ariana Grande |
| 1083 | February 9 | "7 Rings" | Ariana Grande |
| 1083 | February 16 | "7 Rings" | Ariana Grande |
| 1083 | February 23 | "7 Rings" | Ariana Grande |
| 1083 | March 2 | "7 Rings" | Ariana Grande |
| 1084 | March 9 | "Shallow" | Lady Gaga and Bradley Cooper |
| 1085 | March 16 | "Sucker" | Jonas Brothers |
| re | March 23 | "7 Rings" | Ariana Grande |
| re | March 30 | "7 Rings" | Ariana Grande |
| re | April 6 | "7 Rings" | Ariana Grande |
| 1086 | April 13 | "Old Town Road" † | Lil Nas X |
| 1086 | April 20 | "Old Town Road" † | Lil Nas X featuring Billy Ray Cyrus |
| 1086 | April 27 | "Old Town Road" † | Lil Nas X featuring Billy Ray Cyrus |
| 1086 | May 4 | "Old Town Road" † | Lil Nas X featuring Billy Ray Cyrus |
| 1086 | May 11 | "Old Town Road" † | Lil Nas X featuring Billy Ray Cyrus |
| 1086 | May 18 | "Old Town Road" † | Lil Nas X featuring Billy Ray Cyrus |
| 1086 | May 25 | "Old Town Road" † | Lil Nas X featuring Billy Ray Cyrus |
| 1086 | June 1 | "Old Town Road" † | Lil Nas X featuring Billy Ray Cyrus |
| 1086 | June 8 | "Old Town Road" † | Lil Nas X featuring Billy Ray Cyrus |
| 1086 | June 15 | "Old Town Road" † | Lil Nas X featuring Billy Ray Cyrus |
| 1086 | June 22 | "Old Town Road" † | Lil Nas X featuring Billy Ray Cyrus |
| 1086 | June 29 | "Old Town Road" † | Lil Nas X featuring Billy Ray Cyrus |
| 1086 | July 6 | "Old Town Road" † | Lil Nas X featuring Billy Ray Cyrus |
| 1086 | July 13 | "Old Town Road" † | Lil Nas X featuring Billy Ray Cyrus |
| 1086 | July 20 | "Old Town Road" † | Lil Nas X featuring Billy Ray Cyrus |
| 1086 | July 27 | "Old Town Road" † | Lil Nas X featuring Billy Ray Cyrus |
| 1086 | August 3 | "Old Town Road" † | Lil Nas X featuring Billy Ray Cyrus |
| 1086 | August 10 | "Old Town Road" † | Lil Nas X featuring Billy Ray Cyrus |
| 1086 | August 17 | "Old Town Road" † | Lil Nas X featuring Billy Ray Cyrus |
| 1087 | August 24 | "Bad Guy" | Billie Eilish |
| 1088 | August 31 | "Señorita" | Shawn Mendes and Camila Cabello |
| 1089 | September 7 | "Truth Hurts" | Lizzo |
| 1089 | September 14 | "Truth Hurts" | Lizzo |
| 1089 | September 21 | "Truth Hurts" | Lizzo |
| 1089 | September 28 | "Truth Hurts" | Lizzo |
| 1089 | October 5 | "Truth Hurts" | Lizzo |
| 1089 | October 12 | "Truth Hurts" | Lizzo |
| 1090 | October 19 | "Highest in the Room" | Travis Scott |
| re | October 26 | "Truth Hurts" | Lizzo |
| 1091 | November 2 | "Someone You Loved" | Lewis Capaldi |
| 1092 | November 9 | "Lose You to Love Me" | Selena Gomez |
| re | November 16 | "Someone You Loved" | Lewis Capaldi |
| re | November 23 | "Someone You Loved" | Lewis Capaldi |
| 1093 | November 30 | "Circles" | Post Malone |
| 1093 | December 7 | "Circles" | Post Malone |
| 1094 | December 14 | "Heartless" | The Weeknd |
| 1095 | December 21 | "All I Want for Christmas Is You" | Mariah Carey |
| 1095 | December 28 | "All I Want for Christmas Is You" | Mariah Carey |

## Number-one artists

List of number-one artists by total weeks at number one :
| Position | Artist | Weeks at No. 1 |
| 1 | Lil Nas X | 19 |
| 2 | Billy Ray Cyrus | 18 |
| 3 | Ariana Grande | 9 |
| 4 | Lizzo | 7 |
| 5 | Post Malone | 3 |
| 5 | Lewis Capaldi | 3 |
| 7 | Halsey | 2 |
| 7 | Mariah Carey | 2 |
| 9 | Swae Lee | 1 |
| 9 | Lady Gaga | 1 |
| 9 | Bradley Cooper | 1 |
| 9 | Jonas Brothers | 1 |
| 9 | Billie Eilish | 1 |
| 9 | Shawn Mendes | 1 |
| 9 | Camila Cabello | 1 |
| 9 | Travis Scott | 1 |
| 9 | Selena Gomez | 1 |
| 9 | The Weeknd | 1 |