The population of East Lothian is expected to rise by 33% over 25 years
The depute leader of East Lothian Council has said every effort would be made to ensure the area is not spoiled by any future population rise.
Stuart MacKinnon said the council was planning to build a new town and to have more affordable housing in a bid to meet increased demands on the area.
The new town, Blindwells, is planned for a site between Prestonpans and Tranent.
A report by the Registrar General shows a projected population rise of 33% in the area over the next 25 years.
Cllr MacKinnon told the BBC Scotland news website: "We are very excited about an increased population in our area. It is a very nice place to stay and its great transport links attract a lot of people.
"Affordable housing is very much back on our agenda and we have plans for a new town, which will be able to accommodate a lot of people.
"People move here because they have the benefits of the countryside, seaside, heritage and good links to Edinburgh.
"With proper planning and restraint we can ensure the area is not spoiled."
Sam Barrie, 41, moved to Tranent from Edinburgh with her family in July 2007.
Mrs Barrie will add to East Lothian's population when her baby is born in April.
'Space and lifestyle'
She said she wanted the quality of life which East Lothian could offer.
"We had a toddler and a teenager to accommodate and if we had stayed in Edinburgh we couldn't have afforded the type of house which would have suited us all," she said.
"When we lived in the city we often came out to East Lothian for the beaches, and, for my husband, the golf.
"We have the kind of space and the lifestyle we always wanted in East Lothian.
"We have beaches, beautiful countryside and good schools and it is easy to commute to Edinburgh."
The largest increase in 0-15-year-olds in Scotland is expected in East Lothian, at 38%, with the working areas population projected to increase by 30%.
Registrar General Duncan Macniven said: "Over the next 25 years, we expect the population of Scotland to increase by about 7%.
"But East Lothian is likely to grow almost five-times as much."