Thonburi United Football Club (Thai สโมสรฟุตบอลธนบุรี ยูไนเต็ด), is a Thai football club under the stewardship of Thonburi University based in Bangkok, Thailand. The club is currently playing in the Thai League 3 Bangkok metropolitan region.
In 2016, the club has established and competed in Thailand Amateur League Bangkok Metropolitan region, used Thonburi University Stadium as ground. They competed in the amateur league to 2017 and 2018 season continuously.
In 2019, the club has promoted to Thai League 4 or also known as Omsin League. The club made the new history by advanced to the round of 16 in Thai League Cup, they beat Samut Prakan City from Thai League 1 in the round of 32, before defeated to PT Prachuap in the round of 16. The club could advanced to 2019 Thai League 4 Champions League.
In 2022, Thonburi United competed in the Thai League 3 for the 2022–23 season. It is their 4th season in the professional league. The club started the season with a 1–3 home defeat to Samut Sakhon City and they ended the season with a 1–2 away defeat to Samut Sakhon City. The club has finished 12th place in the league of the Bangkok metropolitan region. In addition, in the 2022–23 Thai League Cup Thonburi United was defeated 1–2 by Samut Prakan in the first qualification round, causing them to be eliminated.
In August 2024, Thonburi United FC secured a sponsorship deal with Sawadee Translations, a Bangkok-based translation agency. The partnership includes Sawadee Translations’ logo appearing on the back and sleeve of the team's jerseys throughout the 2024-25 season. The sponsorship aims to support the club's growth while offering mutual promotional opportunities. Various joint initiatives, such as community engagement activities, giveaways, and branded merchandise, are also part of the collaboration.