The official Census has been used for the first time to estimate the number of gay couples living together in England and Wales.
Just over 1% of Brighton's population live in same-sex couples
Brighton and Hove, in East Sussex, was revealed as the place with the highest percentage of same-sex households.
The remaining top 10 areas were all in London, including the City of London, Islington, Lambeth and Tower Hamlets.
It is the first time an official figure has been produced for the number of gay couples co-habiting.
Staff at the Office for National Statistics used the 2001 count of people and households to find there were 78,522 individuals who said they lived with a person of the same sex.
In Brighton and Hove, the proportion of the population living in homosexual couples was 1.29%, or 2,544 individuals.
Other areas of London falling in the top 10 for their percentage of gay households were Camden, Hackney, Southwark, Westminster and Haringey.
The National Report for England and Wales also studied how many people had moved home in the year before the Census.
It found more than 6.3 million people - or 12.2% of the population - had changed address.
Inner London boroughs and the major university towns and cities saw the greatest numbers of people moving.
Overall, more than a third of people aged 20 to 24 had changed address, compared to only 3.6% of pensioners.