The women's balance beam competition at the 2012 Summer Olympics in London was held at the North Greenwich Arena on 7 August. Deng Linlin of China took gold, Sui Lu of China took silver, and Aly Raisman of the United States took the bronze via a tie-breaker.
The top eight competitors in the qualification phase (with a limit of two per country) advanced to the final. Qualification scores were then ignored, with only final-round scores counting.
Oldest and youngest competitors
<small>* Kyla Ross (USA), ranked 6th, and Anastasia Grishina (RUS), ranked 9th, did not advance to the final because of the two-per-country rule.</small>
<small>* Larisa Iordache (ROU), Aliya Mustafina (RUS), Jordyn Wieber (USA), and Sandra IzbaÃÂa (ROU) ranked 11th, 12th, 12th, and 14th, respectively, but did not qualify as reserves because of the two-per-country rule. On 6 August, Diana Bulimar gave up her spot to Iordache, whom Bulimar believed had a better chance of medaling.</small>