Organisers will reduce capacities across venues by closing tiers of stadiums or whole sections of a ground.
Even after the reduction, 250,000 tickets are still available with a further 200,000 set to be put up for sale before the Games begin on July 27.
"They are in reduced size venues of course, we've had to scale down the size of those venues," Coe told reporters.
"We've sold more football tickets than we've sold anything else, we've got 37-38,000 tickets we've sold for Britain ladies v New Zealand which I think benchmarks pretty well for instance with the women's FA Cup final this year which was an all-London affair at the Emirates [Stadium] and they had about 5,000.
"We are not in bad shape on tickets but football tickets at a Games are always the challenge. I think we'll do pretty well."
The football competition is set to take place in six venues across Britain including the Millennium Stadium in Cardiff, City of Coventry Stadium, Old Trafford in Manchester, St James' Park in Newcastle, Hampden Park in Glasgow and London's Wembley Stadium which will host both the men's and women's finals.
