A survey by Fostering Network also found that Scotland has the highest number of people who think they would do a good job fostering children.
The charity carried out the poll to examine attitudes towards fostering and to try to encourage more adults to get involved during Foster Care Fortnight
It also found that 73 per cent of the Scottish population felt positive about foster carers and the work that they do while 23 per cent said they would consider becoming a foster carer now or in the future.
Gemma and Gordon Waters, from Blackburn, West Lothian, were approved as foster carers when they were 21.
Mrs Waters said: "Fostering is an opportunity to work hard, support children who can't live with their families and I'll never be able to tell you how rewarding it is to see a child you care for flourish into adulthood.
"Our son takes an active role in being part of a fostering family and is amazing at helping to befriend and look after the children we care for and I hope that this Foster Care Fortnight makes many more people decide to explore what they can bring to fostering."
Sara Lurie, director of the Fostering Network Scotland, said: "Scotland has long since been enthusiastic about the work that foster carers do within our society. We are a strong and skilled nation of people who are compassionate and want the best for others.
"It's very positive that one-third of us believe that we could become foster carers."