Thailand competed at the 1984 Summer Olympics in Los Angeles, United States. The nation returned to the Summer Games after participating in the American-led boycott of the 1980 Summer Olympics.

Medal	Name	Sport	Event	Date
Silver	Dhawee Umponmaha	Boxing	Light Welterweight	11 August

Men's Individual Competition

• Amphol Amalekajorn – 2342 points (→ 46th place)
• Wachera Piyapattra – 2328 points (→ 50th place)

Women's 100 metres

• Wallapa Tangjitnusom

• First Heat — 12.18s (→ did not advance)

Women's Long Jump

• Sarinee Phenglaor

• Qualification — 5.51 m (→ did not advance, 22nd place)

Athlete	Event	First round	Second round	Third round	Quarterfinals	Semifinals	Final
		Opposition Result	Opposition Result	Opposition Result	Opposition Result	Opposition Result	Opposition Result	Rank
Sanpol Sang-Ano	Men's Light Flyweight	Mwangi (KEN) L RSC–3	did not advance
Wanchai Pongsri	Men's Bantamweight	Bye	Orewa (NIG) L KO–2	did not advance
Dhawee Umponmaha	Men's Light Welterweight	Pradhan (IND) W 5–0	Owiso (KEN) W 3–2	Griffiths (GBR) W 4–1	Maysonet (PUR) W 5–0	Fulger (ROU) W 5–0	Page (USA) L 0–5

Men's 25 metre rapid fire pistol

• Opas Ruengpanyawoodhi (=13th place); Peera Piromrut (40th place)

Men's 50 metre pistol

• Somchai Thingpakdee (=31st place); Nirundon Lepananon (54th place)

Men's 10 metre air rifle

• Manop Leeprasansakul (=43rd place); Tanin Thaisinlp^[1] (47th place)

Men's 50 metre rifle three positions

• Chakrapan Theinthong (=41st place); Manop Leeprasansakul (=44th place)

Men's 50 metre rifle prone

• Udomsak Theinthong (=30th place); Tanin Thaisinlp (=55th place)

Men's 50 metre running target

• Rangsit Yanothai (nk)

Mixed trap

• Damrong Pachonyut (=45th place); Vudthi Bhirombhakdi (64th place)

Mixed skeet

• Somchai Chanthavanij (=58th place); Pichit Burapavong (68th place)

Women's 25 metre pistol

• Angsuman Chotisathein (19th place)

Women's 10 metre air rifle

• Siriwan Bhudvanbhen (31st place); Kanokwan Krittakom (33rd place)

Women's 50 metre rifle three positions

• Thiranun Jinda (=20th place)

• Official Olympic Reports
• International Olympic Committee results database