Shared hallways and easily accessible rental properties mean tenants' details are easier to steal, according to credit reference agency Experian.
This group also tend to use mobile and online services more often, offering more opportunities for thieves to find personal details.
Another recent survey found that ID fraud accounted for 41% of all fraud.
In March, fraud prevention service Cifas said that digitally-savvy young adults were increasingly becoming targets, at fraud hotspots in London, Leicester, Birmingham, Manchester, Leeds and Glasgow.
Now, Experian has said that identity theft has become the most prevalent form of fraud for the first time since the recession.
The victims in one in six of these cases were young tenants, it said.
Wealthy couples were next on the list of victims, with this group particularly targeted in card and loan fraud.
"[The findings] highlight the need for people to think about how they protect their personal information both on and off line," said Nick Mothershaw, of Experian.
High Street banks and the police are running a campaign to make customers more aware of the threat of fraud.

Megan Lee, from Oswaldtwistle, Lancashire, died on 1 January, two days after she was admitted to hospital.
Royal Spice has been temporarily closed by Hyndburn Council due to below standard allergen management and a mice infestation.
Two men from the takeaway held on suspicion of involuntary manslaughter by gross negligence have been bailed.
Blackburn magistrates granted the Hygiene Emergency Prohibition Order earlier.
The authority said the premises in Union Street, Oswaldtwistle, will remain closed until it was satisfied health risks had been removed.
Police have said a post-mortem examination had been carried out but the full results would not be known "for some time".
The arrested men, aged 37 and 38 and from Rossendale and Blackburn respectively, have been bailed until 7 July.

The unnamed pair waited nine months for their Personal Independence Payments (PIPs) to be paid by the Department for Work and Pensions (DWP).
They brought the test case to the High Court, claiming the delay was unlawful.
A minister said "significant progress" had been made in processing claims.
PIPs started replacing disability allowance in April 2013.
Labour, along with several charities, criticised the government for the way it handled the switchover, which left about 3,000 people waiting more than a year to have their welfare claims processed.
The High Court is now conducting a judicial review into the payment system.
The claimants said they struggled to pay for food and fuel because of the delays and their health declined as a result.
They had a right to such benefits under the law and should have received them within a "reasonable time", their lawyers told the court.
One of the claimants, Ms C, from Kent, said she had to leave her job because of ill health. She suffers from ME and severe depression.
"I was completely isolated during the nine months I was waiting for my payments.
"While my wait came to an end, it is worrying that many, many others have still not received a decision."
Justin Tomlinson, the minister for disabled people, said that PIP claims were being processed "at five times the rate they were in January 2014".
He added: "In addition 21% of claimants have been awarded the highest rate, compared to 16% under the disability living allowance, demonstrating that the benefit is being targeted at those who need it most."
But counsel for the claimants said the "most challenging phase" of the PIP rollout was still to come.
About 1.5 million recipients of disability allowance will be moved into the new scheme at the same time as existing PIP claimants face reassessment.
Currently, up to 16% of applicants are still waiting more than 30 weeks for their claims to be completed, the claimants' lawyers said.

A fire crew remains at Plasgran in Manea Road, Wimblington, more than 16 hours after the incident began on Wednesday afternoon.
Road closures are expected to stay in place until midday, the fire service said.
About 75 firefighters worked into the night to put out the fire.
They also prevented its spread to neighbouring properties.
The incident was scaled down at 2300 GMT, when the fire was brought under control.
Renters face the greatest risk from identity thieves owing to their domestic set-up and lifestyle.
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A takeaway has been shut down following a teenager's death from an apparent allergic reaction to one of its meals.
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Two disabled people had to turn to loan sharks and food banks because the government took so long to process their benefit claims, the High Court has heard.
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