2025–26 Thai League 3 Eastern Region

The 2025–26 Thai League 3 Eastern Region is part of the 2025–26 Thai League 3 Regional Stage,^[1] consisting of 12 clubs located in the eastern region of Thailand, as well as some from the eastern part of the central region. The season will commence on 13 September 2025, with clubs competing in a round-robin format featuring home-and-away matches. The Regional Stage will conclude on TBD, at which point the top two clubs will advance to the National Championship Stage, while the bottom-placed club will face relegation to the Thailand Semi-pro League for the following season. This stage exemplifies the competitive edge of clubs from the industrial and coastal areas, where football thrives amidst rapid development and strong community support.

The 2025–26 Thai League 3 season features a number of changes compared to the previous campaign. These include the promotion and relegation of clubs between divisions, several club renamings and rebrandings, and the introduction of a new title sponsor, BYD Auto, which rebranded the competition as the BYD Dolphin League III for sponsorship reasons.

Normally, the champions of each of the six regional groups of the 2025 Thailand Semi-pro League would be promoted to the Thai League 3.^[2] However, in the Western region, the champions, The Wall, failed club licensing and were denied promotion. As a result, only five regional champions earned direct promotion, with several additional clubs promoted under special quotas due to licensing issues and adjustments to balance the number of teams in each group. Club promotion in the Eastern region:

• Banbueng City – promoted as regional champions, later renamed Burapha United.

Alongside the licensing-related relegations, one club was demoted from the Thai League 3 Eastern region after finishing at the bottom of the respective regional leagues in the 2024–25 season.

• Samut Prakan – relegated as the bottom-placed club in the Eastern region.

In the 2025–26 season, Thai League 3 will operate under a title sponsorship arrangement for the first time: BYD Auto (through BYD Rêver Thailand) has become the main sponsor for all three professional tiers in Thailand, including Thai League 3, rebranding it as the BYD Dolphin League III.^[3]

On the broadcasting side, a landmark media rights deal was struck, giving AIS Play (in partnership with Gulf and JAS)^[4] exclusive rights to stream all matches from Thai Leagues 1, 2, and 3, plus domestic cups and youth competitions for the 2025–26 through 2028–29 seasons.^[5] Under this agreement, Thai League 3 matches can be watched live for free via AIS Play, and fans will no longer rely solely on individual clubs' streaming efforts (e.g., via YouTube or Facebook), as they did in previous seasons.

2 clubs have rebranded or changed their logos for the 2025–26 season of the Thai League 3 Eastern region:

• Burapha United, formerly known as Banbueng City, changed their name and logo following promotion from the Thailand Semi-pro League to the 2025–26 Thai League 3 Eastern region. The club replaced its previous emblem, which featured a blue buffalo head, with a newly designed crest depicting a cheetah head accompanied by laurel leaves, a football, and the inscription Since 2025.^[6]
• Customs United, formerly Toko Customs United, simplified their club identity by dropping the prefix "Toko" from both their name and emblem. The crest now displays only the wording "Customs United", while all other design elements remain the same.

The distances between football clubs in the 2025–26 Thai League 3 Eastern Region are approximate and calculated based on the shortest practical and most convenient road routes. These measurements prioritise travel paths that balance proximity with accessibility, avoiding indirect or impractical alternatives even when slightly shorter. By focusing on realistic road travel, the chart represents the actual journeys clubs undertake for away fixtures, reflecting the transportation network and conditions across eastern Thailand. This information offers valuable insight into the logistical challenges teams face throughout the season and serves as an essential reference for planning travel for both clubs and supporters.

Among the recorded distances, the shortest is notably 0 kilometres, representing ACDC and Fleet, as well as Marines and Navy, as each pair shares a home stadium and therefore requires no travel between them. Conversely, the longest road journey spans 195 kilometres, marking the trip from Saimit Kabin United to both ACDC and Fleet, with the distance to each club being identical. In terms of cumulative travel distance over the season, Saimit Kabin United faces the heaviest travel burden at approximately 1,710 kilometres. Meanwhile, Pluakdaeng United records the lowest total travel distance at around 809 kilometres. These variations are detailed in the accompanying table, offering a comprehensive breakdown of inter-club road distances and highlighting the differing logistical demands across the 2025–26 season.

A T3 team could register 3 foreign players from foreign players all around the world. A team can use 3 foreign players on the field in each game.

Note :
: players who released during second leg transfer window;
: players who registered during second leg transfer window.

	AFC member countries players.
	CAF member countries players.
	CONCACAF member countries players.
	CONMEBOL member countries players.
	OFC member countries players.
	UEFA member countries players.
	No foreign player registered.

• Official website of Thai League