A Queensland government review also discovered dozens of public tenants are high-income earners, their salaries far exceeding the social housing limit.
The Liberal National government has been reviewing more than 2000 social housing tenancies since July 1 after announcing annual eligibility checks.
It has to date discovered nine property owners living in public housing, Housing Minister Sam O'Connor told parliament on Tuesday.
Social housing tenants are unable to own or part-own property in Australia or overseas, but there are some exceptions in the case of marriage breakdown, domestic violence or natural disaster-impacted areas.
The review also found 76 social housing tenants were identified as high-income earners, exceeding the $80,000 salary cap.
This includes one couple in Townsville with a joint income of more than $168,000 who were paying $187 a week in rent.
Thirteen households have been notified they're no longer eligible for ongoing public housing and placed on market rent after failing to provide income information.
The review also found one in four tenants were paying too much rent - in some cases by as much as $70 a week - which was immediately reduced, Mr O'Connor said.
"Queenslanders expect a social housing system based around fairness and equity, targeted at helping those who need it most under Labor, but that wasn't the case," he said.
Almost half of Queensland's public housing tenants went more than five years without having their rental eligibility checked under the former Labor government, Mr O'Connor added.
"This inequity is why our government restarted annual rent and eligibility checks for all public housing tenants on July 1."
There are currently more than 52,000 people on Queensland's social housing waitlist.
This is compared with 66,000 in NSW, 65,000 in Victoria, 21,000 in Western Australia, 14,000 in South Australia, 5100 in Tasmania and almost 6000 in the Northern Territory.
Queensland's government has committed $5.6 billion over four years to deliver 2000 social and affordable homes a year.
The annual eligibility checks were launched to confirm social housing tenants still meet income and asset thresholds, with market rent to be charged to people who do not verify their earnings.
Social housing tenants will have rent calculated at 25 per cent of a household's assessable income and if found to pay less, they can be subject to a maximum $15 weekly increase, per year.
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