Team USA had only won a bronze in men's curling since the sport was reintroduced to the Games in 1998, and skip John Shuster's side was considered a long-shot to beat the top-ranked Swedish team, having lost to them 10-4 in the group stages.
The Swedes achieved a double to narrow the score to 10-7 but shook hands during the final end with the situation irretrievable.
After the US scored their five a reeling Sweden chipped two off the deficit in the ninth but there was too much damage to fix and the Swedes finally conceded in the 10th.
Against Sweden, skipped by Sochi silver medalist Niklas Edin, the U.S. were locked at 5-5 after seven of 10 ends but Shuster's men scored five in the eighth end to open up a huge gap. Leading into his final rock, Sweden had the scoring stone, but the Americans had packed the house with four other stones that could all become scores for the stars and stripes if Shuster could clear away Sweden.
Just another fun twist in the story of these lovable guys who, six days ago, were fighting for their Olympic lives and facing elimination, then turned it around and won five straight must-win matches to take home gold.
It was only after the ceremony that four of those five U.S. curlers realized they were wearing medals meant for the winners of the women's competition.
This year's team - Shuster, Tyler George, Matt Hamilton, John Landsteiner and alternate Joe Polo - did it twice in one week.
It meant more Olympic disappointment for Niklas Edin who had skipped Sweden to world championship titles in 2013 and 2015 and a bronze at the Sochi Olympics but could not grab the one medal to elude him.