The Greco-Roman middleweight competition at the 1912 Summer Olympics was part of the wrestling programme.

The drawing and weighing was held on Sunday, July 6 from 2 p.m. to 3.30 p.m. at the Stadium.

When only three wrestlers remain (the medalists), the double-elimination halts and a special final round is used to determine the order of the medals.

Middleweight was the third-heaviest category, including wrestlers weighing 67.5 to 75 kilograms (148.8 to 165.3 lb).

Alfred Gundersen and Wiktor Melin withdrew after their first round losses.

Only in the match between undefeated pair Johansson and Lundstein (in which no elimination was possible) did both wrestlers continue to the fifth round.

The other two matches were both potential eliminations (and thus, the sixth could have been the last non-final round), but the man with one loss came out on top of the undefeated wrestler in both of those.

Thus, all 5 remaining men had one loss going into the seventh and last elimination round.

With three wrestlers remaining, all of the previous results were ignored for the final round.