Latest Ministry of Justice report also confirms black and Asian people remain far more likely to be stopped by police.
The proportion of prisoners in jails in England and Wales who are Muslim has nearly doubled over the past 10 years, according to new figures from the Ministry of Justice.
The latest official snapshot also confirms the ageing profile of the prison population over the last 10 years, with the majority of inmates now over 30, and the number over 60 almost doubling to more than 3,300, or 4%.
The government’s annual report on race in the criminal justice system published on Thursday confirms that black and Asian people remain far more likely than white people to be stopped and searched by the police on the street, arrested and sent to prison on conviction.
The annual statistics say despite a reduced use of stop and search powers by the police, black people remain six times more likely to be stopped, and those who are Asian or mixed race twice as likely to be stopped.
A separate justice ministry 2013 profile of the prison population shows that black, Asian and other minority ethnic groups still make up 26% of those jailed in England and Wales. This is twice the proportion of black, Asian and other minority ethnic groups in the general population, and has remained around this level since the ethnic data was first regularly published in 2004.
The justice ministry figures do show some changes within that overall picture. In particular, the religious profile of the prison population shows there has been a steady rise in the percentage of prisoners who are Muslim, from 7.7% in 2002 to 13.4% in 2012.
The percentage identifying themselves as Christian has fallen over the same period, from 58% to 51%, while those with no religion account for 30% of those inside.
The figures also confirm that the jail population is getting older, partly as a result of an increased number of convictions for historic sex offences following the Jimmy Savile case. A decade ago prisoners under 30 made up the majority of the prison population, or 52%, but the younger age group now only make up 43% of the total prison population of 85,000.
A majority are now over 30. In 2002, the over-40s accounted for only 18% of prisoners, but now they make up 30% of all prisoners.
Prison governors are also having to cope with the problems posed by those over 60, with their percentage growing from 2% to 4% of the total over the past decade. More than 3,300 are over 60, with several jails now being dedicated to holding them. One Norfolk prison holds so many that it can field 26 teams in its bowls club.
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