Having been part of a six - man group who broke away from the field, the ' Weirwolf ' timed his sprint finish to perfection to take the title in one hour ۳۰.۲۰ minutes.
The ۳۳ - year - old came into view of the finishing straight in the lead and pulled away from his rivals to complete a glorious end to a spectacular week.
Victory gave the British wheelchair racing champion a clean sweep in his events having already won the T۵۴ ۸۰۰,۱۵۰۰ and ۵,۰۰۰ metres titles.
" It ' s a dream come true, " Weir told Channel ۴. " Obviously I dreamt about winning all my races but it was going to be a tough order. I really had to dig deep.
" I did have lots of dreams of winning four gold medals but I think everybody has those dreams. I knew I was capable of doing it. "
Woods second
Meanwhile, Shelly Woods added to the final - day success for the hosts when she took silver in the women ' s equivalent race.
Coming into the home straight in a group of four, she held off Sandra Graf of Switzerland, who took bronze, and Amanda McGrory of the United States to claim her first medal of the Games at the last attempt.
American Shirley Reilly won the race in ۱hr ۴۶mins ۳۳secs, a second ahead of the home favourite.
The two further medals mean Great Britain will end up finishing in third place in the overall medals table behind China and Russia.
