Around 2,000 Jewish children have a health condition which limits them in some way, according to a report published this week by the Institute for Jewish Policy Research.
One in 20 of British Jews overall are in bad or very bad health, JPR found in its analysis of the 2011 Census.
Around one in six Jews - nearly 46,000 - reported a chronic health problem or disability with nearly 21,000 restricted "a lot" by it.
More than 800 children and young people aged 19 or below are restricted "a lot".
The area with proportionately the worst health is Southend, where two out of every five Jewish residents are over 65 and 11.3 per cent reported problems.
More women reported restrictive conditions than men, but that reflects the larger proportion of women in the older age groups.
One in 10 Jews are providing unpaid care to family and friends, and more than two out of every five of those in their 50s act as carers.
There were 27 per cent fewer Jews living in care homes with nursing in 2011 than in 2001 - which might reflect a shift from institutional care to keeping people in their home.