Guatemala competed at the 1984 Summer Olympics in Los Angeles, United States. 24 competitors, 20 men and 4 women, took part in 40 events in 9 sports.^[1]

Men's 400 metres

• Alberto López

• Heat — 52.21 (→ did not advance)

Men's Decathlon

• Ángel Estu Díaz

• Final Result — 6342 points (→ 24th place)

Men's 20 km Walk

• José Victor Alonzo

• Final — 1:35:32 (→ 34th place)

Men's 50 km Walk

• José Víctor Alonzo

• Final — 4:36:35 (→ 17th place)

• Christa Shuman
• Patricia Meighan
• Vladimir Samayoa
• Hugo Allan García

Men's Light Flyweight (– 48 kg)

• Carlos Motta

• First Round — Defeated Mustafa Genç (TUR), 5:0
• Second Round — Defeated Daniel Mwangi (KEN), 4:1
• Quarterfinals — Lost to Marcelino Bolivar (VEN), 0:5

One cyclists represented Guatemala in 1984.

1000m time trial

• Max Leiva

Men's 100m Freestyle

• Rodrigo Leal

• Heat — 56.80 (→ did not advance, 58th place)

• Ernesto-José Degenhart

• Heat — 57.20 (→ did not advance, 60th place)

Men's 200m Freestyle

• Roberto Granados

• Heat — 2:05.21 (→ did not advance, 50th place)

• Rodrigo Leal

• Heat — 2:05.96 (→ did not advance, 51st place)

Men's 100m Backstroke

• Ernesto-José Degenhart

• Heat — 1:05.63 (→ did not advance, 39th place)

Men's 200m Backstroke

• Ernesto-José Degenhart

• Heat — 2:24.08 (→ did not advance, 33rd place)

Men's 100m Breaststroke

• Fernando Marroquin

• Heat — 1:09.73 (→ did not advance, 44th place)

Men's 200m Breaststroke

• Fernando Marroquin

• Heat — 2:35.21 (→ did not advance, 40th place)

Men's 100m Butterfly

• Roberto Granados

• Heat — 1:02.32 (→ did not advance, 44th place)

Men's 200m Butterfly

• Roberto Granados

• Heat — 2:13.79 (→ did not advance, 32nd place)

Men's 200m Individual Medley

• Roberto Granados

• Heat — 2:22.73 (→ did not advance, 38th place)

Men's 4 × 100 m Freestyle Relay

• Rodrigo Leal, Fernando Marroquin, Roberto Granados, and Ernesto-José Degenhart

• Heat — 3:52.18 (→ did not advance, 21st place)

Men's 4 × 100 m Medley Relay

• Ernesto José Degenhart, Fernando Marroquin, Roberto Granados, and Rodrigo Leal

• Heat — 4:16.94 (→ did not advance, 19th place)

Women's 100m Freestyle

• Blanca Morales

• Heat — 1:02.48 (→ did not advance, 37th place)

• Karen Slowing

• Heat — 1:03.46 (→ did not advance, 41st place)

Women's 200m Freestyle

• Karen Slowing

• Heat — 2:14.39 (→ did not advance, 31st place)

• Blanca Morales

• Heat — 2:14.79 (→ did not advance, 32nd place)

Women's 400m Freestyle

• Karen Slowing

• Heat — 4:36.87 (→ did not advance, 23rd place)

Women's 800m Freestyle

• Karen Slowing

• Heat — 9:20.68 (→ did not advance, 19th place)

Women's 200m Butterfly

• Blanca Morales

• Heat — 2:25.03 (→ did not advance, 28th place)

Women's 200m Individual Medley

• Blanca Morales

• Heat — 2:38.16 (→ did not advance, 27th place)