The Men's Finn was a sailing event on the Sailing at the 2012 Summer Olympics program in Weymouth and Portland National Sailing Academy. Eleven races were scheduled and completed. 24 sailors, on 24 boats, from 24 nations competed. Ten boats qualified for the medal race on course area Nothe in front of Weymouth, where each position scored double points.

The Finn dinghy is a single-handed, cat-rigged sailboat, and a former Olympic class for men's sailing. Since its debut at the 1952 Summer Olympics in Helsinki, the Finn featured in every summer Olympics until 2020, making it the longest serving dinghy in the Olympic Regatta and one of the most prolific Olympic sailboats,. The Finn is a physically demanding boat to race at the highest levels, especially since the class rules now allow unlimited boat rocking and sail pumping when the wind is above 10 knots. The event will not feature on the Olympic programme from 2024.