The survey shows that Shropshire is the most-affordable destination for a one-week holiday rental from June to August 2014.
Including two-bedroom holiday rental accommodation, one dining-out meal and basic groceries, a Shropshire self-catering trip cost £566.
The next best-value destination was Dumfries and Galloway in Scotland (£568) followed by Lincolnshire (£569), Derbyshire (£570) and North Yorkshire (£627).
Most-expensive destinations in the survey were Cornwall (£854), Dorset (£834) and Devon (£826).
Taking just the accommodation into account, Dumfries and Galloway is the least-expensive destination, at £450. In contrast, the accommodation part of a self-catering week in Cornwall would set a family back £745.
TripAdvisor said the three most-expensive locations were in south west England.
"Self-catering holidays are a great way to keep costs down without compromising on quality," said TripAdvisor spokesman James Kay.
Commenting on the survey, Simon McCloy Chief Executive at Shropshire Tourism said “We are delighted but not surprised with the results of the latest TripAdvisor survey. Shropshire has always offered real value for money to visitors and our self catering members should be proud of the excellent quality and service they provide, at extremely affordable rates.
Shropshire is a genuine alternative for holidaymakers and short-break takers looking for somewhere different to the busier and more expensive tourist areas and the important thing is they don’t have to compromise on quality; What we already know and visitors discover for themselves is Shropshire offers a truly great experience without breaking the bank.”
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This is the official tourism and visitor website for Shrewsbury provided by Shropshire Tourism, the official destination marketing organisation for Shropshire - read more