Arrests of female suspects doubled to 50 in the year up to September 2015 compared with the previous year, while the number of under-18s increased from eight to 15.
There was a 31-percent rise in the number of suspects arrested for international-related terror offences, as security services sought to counter the terror threat from Islamic State (IS, formerly ISIS/ISIL).
Scotland Yard has said it is making nearly one arrest per day as part of a sweeping counter-terror effort.
According to the Home Office, women now account for 16 percent of all arrests, twice the usual number.
"The majority of the increase in the number of women getting arrested has been linked to international-related terrorism," the department's quarterly bulletin said.
Nearly 40 percent (124) of all those arrested were charged, 22 percent released on bail (68), and 37 percent (115) released without charge.
Figures demonstrate a 41-percent increase in the number of suspects who considered themselves Asian and a 25-percent rise in those who consider themselves white.
Nearly 80 percent of those arrested were British or held British dual nationality, a significant increase in recent years.
"Since 11 September 2001 (when the data collection began), only 56 percent of those arrested were of British, or British dual nationality," the report said.
The figures represent the highest total terror arrests for a year to September on record.
'None of the UK's 7 foiled terror plots were directed from Syria' - Alex Salmond https://t.co/Rfs2bzHg4f pic.twitter.com/VZxIc0bcQC
โ RT UK (@RTUKnews) December 8, 2015
Home Office terrorism adviser Jahan Mahmood told Sky News the government is misrepresenting the severity of the terror threat and in turn putting pressure on police forces to carry out arrests.
"There are simply too many arrests. I put that down to the legislation, but also because of this constant talk about the threat level being severe. That creates this atmosphere of fear.
"The implications of getting it wrong can only further radicalize some individuals and that's the worry," he added.
Comment: The recent terror attacks have provided the UK and France with the perfect excuse to clamp down on the population in their quest for total control, and to give the impression that they are actually doing something positive to fight the 'terrorist menace'. Considering the real threats from the looming global economic crisis and spiraling poverty for which they have no concrete plans to address, their only answer is to terrorize their own people.