Thai Premier League
Season	1998
Dates	2 May – 3 October
Champions	Sinthana
Relegated	UCOM Raj Pracha
1999–2000 Asian Club Championship	Sinthana
1999–2000 Asian Cup Winners Cup	Bangkok Bank FC
Top goalscorer	Ronnachai Sayomchai (Port Authority of Thailand) (23)
← 1997 1999 →

The 1998 Thai Premier League consisted of 12 teams. The bottom club would be relegated to the Thailand Division 1 League. The club that came 11th would play in a relegation / promotion match against the club that came second in the Thailand Division 1 League

Defending Champions Royal Thai Air Force should have entered the next edition of the Asian Club Championship, but refused due to lack of funding. BEC Tero Sasana took their place.

The league was also known as the Caltex Premier League.

Member clubs locations

Bangkok

Bangkok teams
Bangkok Bank
Bangkok Metropolitan Administration
Sinthana
Osotsapa M-150
Port Authority of Thailand
UCOM Raj Pracha
Royal Thai Air Force
Royal Thai Army
Krung Thai Bank
Thai Farmers Bank
TOT
Tero Sasana

Locations of the Thai Premier League 1998 teams

Final league table

Pos	Team	Pld	W	D	L	GF	GA	GD	Pts	Qualification or relegation
1	Sinthana	22	13	3	6	37	28	+9	42	Champion and Qualification for the 1999–2000 Asian Club Championship
2	Royal Thai Air Force^[a]	22	10	10	2	52	31	+21	40
3	BEC Tero Sasana	22	10	8	4	47	23	+24	38
4	Port Authority	22	10	7	5	50	27	+23	37
5	Bangkok Bank	22	6	13	3	33	27	+6	31
6	TOT	22	8	6	8	36	37	−1	30
7	Royal Thai Army	22	7	5	10	35	42	−7	26
8	Thai Farmers Bank	22	5	10	7	33	37	−4	25
9	Krung Thai Bank^[b]	22	6	4	12	24	37	−13	22
10	Osotsapa^[b]	22	4	9	9	22	47	−25	21
11	Bangkok Metropolitan	22	4	8	10	30	37	−7	20	Qualification for the promotion/relegation playoff
12	UCOM Raj Pracha	22	4	7	11	28	50	−22	19	Relegation spot

Source: rsssf.com
Rules for classification: 1st points; 2nd head-to-head; 3rd goal difference; 4th goals scored
Notes:

The club that came 11th would play in a relegation / promotion match against the runner-up in the Thailand Division 1 League.

January 24 and January 31, 1998

Team 1	Result	Team 2
† Bangkok Metropolitan Administration	3-1	Assumption Sriracha

The bottom club would be relegated, with the team coming 11th, to play in a relegation / promotion matchup against the 2nd placed team in Thailand Division 1 League.
UCOM Raj Pracha were relegated and replaced by 2nd level winners Bangkok Bank of Commerce.
Bangkok Metropolitan Administration overcame Assumption Sriracha in the playoff match.
Tero Sasana changed the club's name again to BEC Tero Sasana with the main sponsor, Thailand’s Entertainment giant "BEC Tero Entertainment."

The Singha sponsored Queen's Cup was postponed because of lack of sponsorship, will be held next year but with reduced prize money.

Bangkok Bank won the 1998 Thailand FA Cup, and their 3rd victory in this competition. It is unclear whom they beat in the final

1998 saw the 14th edition of the Yamaha Thailand Cup.

It was Thailand's main inter-provincial competition, played between qualifiers from various regions.

The first round saw four groups of four teams, of which the top two sides qualified for the Quarter-Final knockout stage.

BEC Tero Sasana represented Thailand in the 1998–99 Asian Club Championship, where they would reach the second round, beaten by Chinese opposition in Dalian Wanda, the same club who ended Bangkok Bank's adventure the previous year.
Sinthana made the second round of the 1998–99 Asian Cup Winners Cup, where they were out classed by Japanese opposition in Kashima Antlers.

The champion for the 1998 season was Sinthana. It was the team's first title.

Thai League 1

Thai League 1
Thai League Co.,Ltd
2023–24 clubs	Bangkok United BG Pathum United Buriram United Chiangrai United Chonburi Khon Kaen United Lamphun Warriors Muangthong United Nakhon Pathom United Police Tero Port PT Prachuap Ratchaburi Sukhothai Trat Uthai Thani
Former clubs	Chainat Hornbill Chiangmai Chiangmai United Customs United Khon Kaen Lampang Nakhon Ratchasima Nongbua Pitchaya Rayong Navy Rajpracha Samutsongkhram Samut Prakan City Suphanburi
Dissolved clubs	Air Force United Army United Bangkok Bank Bangkok Bank of Commerce Bangkok Christian College BBCU Krung Thai Bank Pattaya United Police United PTT Rayong Raj-Vithi RBAC Sisaket Sriracha Songkhla United Super Power Samut Prakan Thai Farmers Bank Thai Honda TOT TTM FC Ubon United
Seasons	1996–97 1997 1998 1999 2000 2001–02 2002–03 2003–04 2004–05 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020–21 2021–22 2022–23 2023–24
All-time table Broadcasters Coach of the Year Managers Winners List of foreign players Records Reserve team