The boys' 55 kg competition in taekwondo at the 2010 Summer Youth Olympics in Singapore took place on August 16. A total of 12 men competed in this event, limited to fighters whose body weight was less than 55 kilograms. Preliminaries started at 15:04, quarterfinals started at 17:00, semifinals at 19:02 and the final at 20:09. Two bronze medals were awarded at the Taekwondo competitions.

Legend

• PTG — Won by Points Gap
• SUP — Won by Superiority
• OT — Won on over time (Golden Point)

Main bracket

First round

Quarterfinals

Semifinals

Final

Kaveh Rezaei (IRI)

Mohamed Asal (EGY)

DSQ

Peterson Sertune (HAI)

RSC 1 0:55

Peterson Sertune (HAI)

Kaveh Rezaei (IRI)

Thiaerry Mabounda (CGO)

4

Jia Tan (SIN)

RSC 3 1:33

Naing Dwe Shein Shein (MYA)

5

Naing Dwe Shein Shein (MYA)

5

Jia Tan (SIN)

6

Kaveh Rezaei (IRI)

4

Nursultan Mamayev (KAZ)

2

Quoc Cuong Nguyen (VIE)

4

Óscar Muñoz (COL)

10

Óscar Muñoz (COL)

3

Ebrahim Ahmed (BRN)

7

Quoc Cuong Nguyen (VIE)

5

Nursultan Mamayev (KAZ)

8

Nursultan Mamayev (KAZ)

6

Ranjan Shrestha (NEP)

3

Nursultan Mamayev (KAZ)

2

José Cobas (CUB)

0

• Draw^{[permanent dead link]}