In Brisbane's inner five-kilometre ring, the vacancy rates tightened from 4 per cent last quarter to 3.5 per cent in the March 2018 quarter.

That takes the rental market in the inner city from the "weak" range to a more healthy zone, the Real Estate Institute of Queensland's latest vacancy rate report reveals.

The REIQ pointed to the shift in Brisbane's inner suburbs as positive news, reflecting healthy rental options for tenants and good opportunities for landlords to secure good tenants.

It is a turnaround for the inner-city market, which hit 4.4 per cent in the March 2017 quarter - its highest vacancy rate in at least a decade.

Brisbane's middle ring, five to 20 kilometres from the CBD, eased, moving from 2.1 per cent to 2.8 per cent, although it was still tighter than the same time last year.

In outer Brisbane, the rental vacancy rate moved from 1.9 per cent to 2 per cent.

Across Brisbane City Council, the vacancy rate eased just 0.1 per cent to 3.1 per cent.

REIQ chief executive Antonia Mercorella said it was gratifying that all areas of the Brisbane rental market were operating in a healthy range.

"The data shows a very resilient market capable of absorbing the perceived oversupply," she said.

Ipswich tightened marginally, moving from 3.1 to 3 per cent.

Ms Mercorella said the Ipswich area was a growth corridor for Queensland.

"We're seeing buyers and renters flocking to this part of the south-east corner," she said.

"It's great news that the rental market is maintaining its stability and healthy status."

The Logan rental market eased 0.2 per cent to reach a 2 per cent rental vacancy rate.

The REIQ said regional Queensland, in particular, had delivered good results in the wake of two to three bleak years.

Ms Mercorella said the regional vacancies' improvement followed, broadly speaking, similar small improvements in the previous quarter.

"Some of our markets, such as the Gold and Sunshine coasts, remain uncomfortably tight and we would like to see more investors enter those markets," she said.

The Gold Coast held steady at 1.1 per cent, and the market was measured in the lead-up to the Commonwealth Games.

However, early next year, the athletes village will be redeveloped into a Health and Knowledge Precinct, including more than 1200 apartments and townhouses.

Ms Mercorella said the REIQ hoped the units would find investor buyers, which could contribute to easing the tight rental conditions on the Gold Coast.

The Sunshine Coast had an overall vacancy rate of 1 per cent.

Caloundra, along with Gympie, had the tightest vacancy rate in Queensland, with just 0.5 per cent of rental properties vacant.

"The Sunshine Coast is very challenging for renters who are looking for accommodation and we have said consistently for quite some time that this market would benefit from additional investor activity," Ms Mercorella said.

"The upward pressure on rents, as a result of this tight vacancy rate, will serve to push this market towards unaffordable."

Noosa also had limited supply, at just 0.8 per cent.

"It's no surprise that renters are flocking to this market, it's such a stunning part of the world with employment opportunities, but additional supply into this market would be very beneficial," Ms Mercorella said.

It comes after new figures from the Domain Group's March quarter Rental Report showed Brisbane was one of the cheapest capital cities in which to rent in the country, beaten only by Adelaide and Perth.

In the Brisbane local government area, rents remained flat for the past 12 months, with the median asking rent for houses still $450 a week, with no yearly or quarterly change.