Tonga at the 2019 World Athletics Championships

Tonga competed at the 2019 World Athletics Championships in Doha, Qatar, from 27 September–6 October 2019. Tonga had entered 1 athlete.

Result

 * Key
 * Note–Ranks given for track events are for the entire round
 * Q = Qualified for the next round
 * q = Qualified for the next round as a fastest loser or, in field events, by position without achieving the qualifying target
 * NR = National record
 * GR = Games record
 * PB = Personal best
 * SB = Season best
 * DNF = Did not finish
 * DNS = Did not start
 * NM = No mark
 * N/A = Round not applicable for the event
 * Bye = Athlete not required to compete in round

Men

 * Track and road events