Liberia competed at the 1972 Summer Olympics in Munich, West Germany. The nation returned to the Olympic Games after missing the 1968 Summer Olympics.

Men's 100 metres

• Andrew Sartee

• First Heat — 11.09s (→ did not advance)

Men's 800 metres

• Thomas O'Brien Howe

• Heat — 2:00.7 (→ did not advance)

Men's 1500 metres

• Edward Kar

• Heat — 4:21.4 (→ did not advance)

Men's 4 × 100 m Relay

• Andrew Sartee, Thomas O'Brien Howe, Dominic Saidu, and Thomas Nma

• Heat — DNF (→ did not advance)

• Official Olympic Reports