The survey, which claims that female cleanliness is a myth, found that the difference between the sexes was starkest in London, where 21 per cent of women were carrying fecal bacteria on their hands, compared with 6 per cent of men.
Women in Birmingham and Cardiff also outranked men for bacterial contamination, but in the north - Newcastle and Liverpool - stereotypes reasserted themselves and men had the filthiest hands, the Dirty Hands study found.
The research highlighted poor hygiene habits as part of the first Global Handwashing Day today.
Commuters' at five train stations were swab-tested for bacteria.
The results have been analyzed by the London School of Hygiene and Tropical medicine.
The study revealed a north-south divide. Commuters in Newcastle were up to three times more likely than those in London to have the bacteria on their hands - 44 per cent versus 13 per cent. More than a third in Liverpool were contaminated, compared to less than a quarter in Birmingham and Cardiff.
"We were flabbergasted so many people had fecal bugs on their hands. If these people had been suffering from a diarrheal disease, the potential for it to be passed round would be greatly increased by their failure to wash their hands after going to the toilet," the Independent quoted Val Curtis, director of the Hygiene Centre at the London School of Hygiene and Tropical Medicine, as saying.