Thailand competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. Since the nation's official debut in 1952, Thai athletes had appeared in every edition of the Summer Olympic Games, with the exception of the 1980 Summer Olympics in Moscow, because of its support of the US-led boycott.

The National Olympic Committee of Thailand fielded a team of 54 athletes, 26 men and 28 women, to compete in fifteen sports at the Games. It was the nation's joint-largest ever delegation sent to the Olympics, alongside the team sent to the Tokyo Games in 1964. Thailand made its Olympic debut in women's boxing, BMX cycling, golf, and men's table tennis. Moreover, it registered more female athletes than males for only the second time in history.

Fourteen athletes on the Thai roster competed at London 2012, including badminton star Boonsak Ponsana (men's singles) and table tennis player Nanthana Komwong, both of whom made their historic fifth Olympic appearance as the most experienced competitors on the team. Apart from the veterans, four more Thai athletes made their third Olympic appearance, namely welterweight boxer Sailom Adi, freestyle swimmer Natthanan Junkrajang, pistol shooter Tanyaporn Prucksakorn, and world's top-ranked skeet shooter Sutiya Jiewchaloemmit. Other notable Thai athletes included professional golfer Ariya Jutanugarn, who became the first Thai golfer capture the major championship title, and world's top four badminton player Ratchanok Intanon (women's singles), who was named as the country's first female flag bearer for the opening ceremony.

Thailand left Rio de Janeiro with a total of six medals (two for each color), its most successful Olympics since 2004. Four of these medals were awarded to the team in weightlifting, including two golds won by Sopita Tanasan (women's 48 kg) and Sukanya Srisurat (women's 58 kg), and two others in taekwondo. For the first time in four decades, Thailand failed to pick up a single medal in boxing, as neither of its fighters progressed beyond the quarterfinal round.

Medalists

| width=78% align=left valign=top |

Medal Name Sport Event Date Sopita Tanasan Weightlifting Women's 48 kg Sukanya Srisurat Weightlifting Women's 58 kg Pimsiri Sirikaew Weightlifting Women's 58 kg Tawin Hanprab Taekwondo Men's 58 kg Sinphet Kruaithong Weightlifting Men's 56 kg Panipak Wongpattanakit Taekwondo Women's 49 kg

| width=22% align=left valign=top | Medals by sportSport TotalWeightlifting 2 1 14Taekwondo 0 1 12 Total 2 2 2 6

Competitors SportMenWomenTotalArchery 1 0 1Athletics 1 3 4Badminton 2 5 7Boxing 4 1 5Cycling 0 2 2Golf 2 2 4Judo 1 0 1Rowing 1 1 2Sailing 2 2 4Shooting 2 3 5Swimming 1 1 2Table tennis 1 2 3Taekwondo 1 2 3Tennis 2 0 2Weightlifting 5 4 9 Total 26 28 54

Archery

One Thai archer qualified for the men's individual recurve at the Olympics by virtue of a top five national finish at the 2016 Archery World Cup meet in Antalya, Turkey.

AthleteEventRanking roundRound of 64Round of 32Round of 16QuarterfinalsSemifinalsFinal / ScoreSeedOppositionScoreOppositionScoreOppositionScoreOppositionScoreOppositionScoreOppositionScoreRankWitthaya ThamwongMen's individual65541W 7–3W 6–5L 0–6Did not advance

Athletics

Thai athletes have so far achieved qualifying standards in the following athletics events (up to a maximum of 3 athletes in each event):

Track & road events AthleteEventFinalResultRankBoonthung SrisungMen's marathon2:37:46133Natthaya ThanaronnawatWomen's marathon3:11:31 130Jane Vongvorachoti2:47:27 91

Field events AthleteEventQualificationFinalDistancePositionDistancePositionSubenrat InsaengWomen's discus throw56.6424Did not advance

Badminton

Thailand has qualified a total of seven badminton players for each of the following events into the Olympic tournament based on the BWF World Rankings as of 5 May 2016: two entries in the women's singles, one in the men's singles, and a pair each in the women's and mixed doubles.

Men AthleteEventGroup StageEliminationQuarterfinalSemifinalFinal / OppositionScoreOppositionScoreRankOppositionScoreOppositionScoreOppositionScoreOppositionScoreRankBoonsak PonsanaSinglesL (14–21, 13–21)W (21–19, 17–21, 21−16)2Did not advance

Women AthleteEventGroup StageEliminationQuarterfinalSemifinalFinal / OppositionScoreOppositionScoreOppositionScoreRankOppositionScoreOppositionScoreOppositionScoreOppositionScoreRankPorntip BuranaprasertsukSinglesW (21–14, 21–15)W (21–7, 21–18)1 QW (21–14, 21–16)L (12–21, 17–21)Did not advanceRatchanok IntanonW (21–14, 21–13)W (21–18, 21–12)1 QL (19–21, 16–21)Did not advancePuttita SupajirakulSapsiree TaerattanachaiDoublesL (13–21, 20–22)L (15–21, 15–21)W (21–17, 21–15)3Did not advance

Mixed AthleteEventGroup StageQuarterfinalSemifinalFinal / OppositionScoreOppositionScoreOppositionScoreRankOppositionScoreOppositionScoreOppositionScoreRankBodin IsaraSavitree AmitrapaiDoublesL (13–21, 19–21)L (11–21, 13–21)W (21–13, 21–18)3Did not advance

Boxing

Thailand has entered four boxers to compete in the Olympic boxing tournament. Wuttichai Masuk became the first Thai boxer to be selected to the Olympic team, following his box-off victory at the 2015 World Championships. Meanwhile, 2012 Olympians Chatchai Butdee and Sailom Adi had claimed their Olympic spots at the 2016 Asia & Oceania Qualification Tournament in Qian'an, China.

Peamwilai Laopeam was the only Thai woman to book an Olympic spot, with a quarterfinal victory at the World Championships in Astana, Kazakhstan. Lightweight boxer Amnat Ruenroeng rounded out the Thai roster by his performance at the 2016 APB and WSB Olympic Qualifier in Vargas, Venezuela.

AthleteEventRound of 32Round of 16QuarterfinalsSemifinalsFinalOppositionResultOppositionResultOppositionResultOppositionResultOppositionResultRankChatchai ButdeeMen's bantamweightW 3–0L 1-2Did not advanceAmnat RuenroengMen's lightweightW 3–0L Did not advanceWuttichai MasukMen's light welterweightL 1–2Did not advanceSailom AdiMen's welterweightW 2–1W 3–0L 0–3Did not advancePeamwilai LaopeamWomen's flyweightL 0–3Did not advance

Cycling

Road Thailand has qualified one rider in the women's Olympic road race by virtue of a top 100 individual placement in the 2016 UCI World Rankings.

AthleteEventTimeRankJutatip ManeephanWomen's road raceDid not finish

BMX Thailand received an invitation from the UCI to send a women's BMX rider to the Olympics, as the next highest-ranked eligible nation, not yet qualified, in the UCI Olympic Ranking List of May 31, 2016. BMX rider and Asian Games champion Amanda Carr was named to the Thai team on June 1, 2016.

AthleteEventSeedingSemifinalFinalResultRankPointsRankResultRankAmanda CarrWomen's BMX36.46413186Did not advance

Golf

Thailand has entered four golfers (two per gender) into the Olympic tournament. Kiradech Aphibarnrat (world no. 53), Thongchai Jaidee (world no. 38), Ariya Jutanugarn (world no. 7) and Pornanong Phatlum (world no. 34) qualified directly among the top 60 eligible players for their respective individual events based on the IGF World Rankings as of 11 July 2016.

AthleteEventRound 1Round 2Round 3Round 4TotalScoreScoreScoreScoreScoreParRankKiradech AphibarnratMen's71696967276 −8=5Thongchai Jaidee70756767279 −5=15Ariya JutanugarnWomen's6571WD136 −6Pornanong Phatlum71726971283 −1=25

Judo

Thailand has qualified one judoka for the men's heavyweight category (+100 kg) at the Games. Kunathip Yea-on earned a continental quota spot from the Asian region, as the highest-ranked Thai judoka outside of direct qualifying position in the IJF World Ranking List of May 30, 2016.

AthleteEventRound of 32Round of 16QuarterfinalsSemifinalsRepechageFinal / OppositionResultOppositionResultOppositionResultOppositionResultOppositionResultOppositionResultRankKunathip Yea-onMen's +100 kgL 000–100Did not advance

Rowing

Thailand has qualified one boat each in the men's and women's single sculls at the 2016 Asia & Oceania Continental Qualification Regatta in Chungju, South Korea.

AthleteEventHeatsRepechageQuarterfinalsSemifinalsFinalTimeRankTimeRankTimeRankTimeRankTime RankJaruwat SaensukMen's single sculls7:25.06 4 R7:16.39 3 SE/Fcolspan=2 7:54.381 FE 7:49.8626Phuttharaksa NeegreeWomen's single sculls9:17:95 4 R8:07.92 4 SE/Fcolspan=2 8:51.99 3 FE 8:41.3427 Qualification Legend: FA=Final A (medal); FB=Final B (non-medal); FC=Final C (non-medal); FD=Final D (non-medal); FE=Final E (non-medal); FF=Final F (non-medal); SA/B=Semifinals A/B; SC/D=Semifinals C/D; SE/F=Semifinals E/F; QF=Quarterfinals; R=Repechage

Sailing

Thai sailors have qualified one boat in each of the following classes through the individual fleet World Championships, and the Asian Sailing Championships.

AthleteEventRaceNet pointsFinal rank123456789101112M*Natthaphong PhonoppharatMen's RS:X322932143721302425252827EL28729Keerati BualongMen's Laser25383732383935 182747colspan=2 EL28737Siripon KaewduangngamWomen's RS:X1923221811227718141517EL16618Kamolwan ChanyimWomen's Laser Radial25272831323430313831colspan=2 EL26832 M = Medal race; EL = Eliminated – did not advance into the medal race

Shooting

Thai shooters have achieved quota places for the following events by virtue of their best finishes at the 2015 ISSF World Cup series, and Asian Championships, as long as they obtained a minimum qualifying score (MQS) as of March 31, 2016.

AthleteEventQualificationSemifinalFinalPointsRankPointsRankPointsRankNapis TortungpanichMen's 10 m air rifle617.441colspan=2 Did not advanceMen's 50 m rifle prone620.929colspan=2 Did not advanceMen's 50 m rifle 3 positions115937colspan=2 Did not advanceAttapon Uea-areeMen's 50 m rifle prone625.37 Qcolspan=2 80.88Sutiya JiewchaloemmitWomen's skeet6810Did not advancePim-on KlaisubanWomen's 10 m air pistol37339colspan=2 Did not advanceWomen's 25 m pistol57523Did not advanceTanyaporn PrucksakornWomen's 10 m air pistol37827colspan=2 Did not advanceWomen's 25 m pistol56832Did not advance Qualification Legend: Q = Qualify for the next round; q = Qualify for the bronze medal (shotgun)

Swimming

Thailand has received a Universality invitation from FINA to send two swimmers (one male and one female) to the Olympics.

AthleteEventHeatSemifinalFinalTimeRankTimeRankTimeRankRadomyos MatjiurMen's 100 m breaststroke1:02.36 37Did not advanceNatthanan JunkrajangWomen's 100 m freestyle56.2432Did not advance

Table tennis

Thailand has entered three athletes into the table tennis competition at the Games. Suthasini Sawettabut and incoming five-time Olympian Nanthana Komwong scored a second-stage victory each to book two out of six remaining Olympic spots in the women's singles at the Asian Qualification Tournament in Hong Kong. Meanwhile, Padasak Tanviriyavechakul received an unused Olympic spot in the men's singles as the next highest-ranked player, after Hong Kong made its decision to decline a berth in the same tournament.

AthleteEventPreliminaryRound 1Round 2Round 3Round of 16QuarterfinalsSemifinalsFinal / OppositionResultOppositionResultOppositionResultOppositionResultOppositionResultOppositionResultOppositionResultOppositionResultRankPadasak TanviriyavechakulMen's singlesW 4–1L 0–4Did not advanceNanthana KomwongWomen's singlesW 4–1W 4–3L 0–4Did not advanceSuthasini SawettabutW 4–3L 2–4Did not advance

Taekwondo

Panipak Wongpattanakit qualified automatically for the women's flyweight category (49 kg) by finishing in the top 6 WTF Olympic rankings. Meanwhile, Tawin Hanprab and Phannapa Harnsujin secured the remaining spots on the Thai team by virtue of their top two finish in the men's flyweight (58 kg) and women's lightweight category (57 kg), respectively, at the 2016 Asian Qualification Tournament in Manila, Philippines.