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Almost all of the "least obese" local authorities in England are in London.
Kensington and Chelsea has the lowest number of overweight residents, followed by Tower Hamlets and Richmond upon Thames.
Here's the full list of the thinnest local authorities in England:
1. Kensington and Chelsea 45.9%
2. Tower Hamlets 47.2%
3. Richmond upon Thames 47.6%
4. Hackney 48.7%
5. Brighton and Hove 49.2%
6. Hammersmith and Fulham 49.7%
7. Camden 50.1%
8. Lambeth 51.8%
9. Wandsworth 52.2%
10. Westminster 52.6%
The new data reveals the fattest and thinnest parts of England and the scale of the obesity crisis for the first time.
In some parts of England, three-quarters of people are overweight or obese.
Overall, 63.8% of adults in England have a body mass index (BMI) of 25 or over.
But in the fattest local authority area in west Cumbria, 75.9% of people are overweight or obese.
Also with more than 70% of residents falling into the overweight or obese category are Doncaster, Castle Point in Essex, County Durham and Milton Keynes.
Tam Fry, from the National Obesity Forum, said: "The publication of these figures has to be welcomed because they will give local authorities a better chance of fighting obesity than did 15 years of tackling the epidemic from Westminster.
"The overall figure of 64% for the country is bad enough but when figures rise to around 80% for some local areas, one has to believe that the problem may be insurmountable.
"The projection that 50% of the country could be obese before 2050 could unfortunately come to pass unless really radical steps are taken now by central government to tackle the problem."
Joseph Clift, policy manager at the British Heart Foundation, said: "These new figures hold a mirror in front of the country's waistline and it reflects a very unhealthy picture.
"Put simply, too many people weigh too much.
"This should be a catalyst for action at a local and national level."
Professor Kevin Fenton, director of health and wellbeing at Public Health England, which released the figures, said: "Many local authorities are already working hard to reduce obesity levels and these new data will help all local areas monitor their progress in tackling these long-standing problems.
"There is no silver bullet to reducing obesity; it is a complex issue that requires action at individual, family, local and national levels. We can all play our part in this by eating a healthy, balanced diet and being more active."