List of Music Bank Chart winners (2019)

The Music Bank Chart is a record chart established in 1998 on the South Korean KBS television music program Music Bank. Every week during its live broadcast, the show gives an award for the best-performing single on the South Korean chart. The chart includes digital performance on domestic online music services (65%), album sales (5%), number of times the single was broadcast on KBS TV (20%), and viewers' choice (10%) in its ranking methodology. The score for domestic online music services is calculated using data from Melon, Bugs, Genie Music and Soribada. The show was hosted by actor Choi Won-myeong and Lovelyz member Kei from June 15, 2018, until June 28, 2019. Actress Shin Ye-eun and Golden Child member Choi Bo-min were announced as new hosts the following week.

In 2019, 38 singles achieved a number one on the chart and 28 music acts were awarded first-place trophies. "Boy with Luv" by BTS and American singer-songwriter Halsey won for seven weeks and is the song with the most wins of the year. The seven number ones helped BTS become the act with the most wins of the year. The song also acquired the highest point total on the April 26 broadcast with a score of 13,007. Ten acts achieved more than one number one on the chart in 2019. The first number one of the year was achieved by Exo with their single "Tempo"; the group went on to have another number one single in December with "Obsession" which spent two consecutive weeks at the top. NU'EST ranked number one on the chart for the first time with "Bet Bet" over seven years after their debut. Their single "Love Me" went on to rank number one on the chart on the November 1 broadcast. Two other boy groups ranked more than one single at number one on the chart in 2019: Got7 with "Eclipse" and "You Calling My Name", and Seventeen with "Home" and "Fear".

Former I.O.I member Chungha achieved two number one singles with "Gotta Go" and "Snapping". Singer-songwriter IU ranked two singles at number one on the chart, achieved with "Love Poem" and "Blueming". Four girl groups had more than one number one single on the chart. Itzy won on Music Bank for the first time with their debut single "Dalla Dalla" and went on to rank another single at number one with "Icy" in August. Both singles ranked number one for two weeks. GFriend, Mamamoo and Red Velvet ranked two singles at number one with "Sunrise" and "Fever", "Gogobebe" and "Hip", and "Zimzalabim" and "Umpah Umpah", respectively.

Besides Itzy and NU'EST, seven other acts achieved their first number one on Music Bank in 2019. Exo's subunit Exo-SC achieved their first music show award for "What a Life". Exo member Baekhyun ranked number one on a music show for the first time with "UN Village" on Music Bank while fellow member Chen achieved his first Music Bank award with "Shall We?". Duo Bolbbalgan4's single "Workaholic" helped them achieve their first number one on the chart on the September 20 broadcast. Former members of Wanna One – a group formed through the second season of the survival reality show Produce 101 – Kang Daniel and Park Ji-hoon won their first ever music show award with "What Are You Up To" and "L.O.V.E", respectively. Iz*One and X1, formed through the third and fourth seasons of Produce 101 gained their first number one on the chart with "Violeta" and "Flash", respectively. The latter group would go on to disband in January 2023 due to the Mnet vote manipulation investigation.