3. Las Vegas, NV
Senior population growth (2000 to 2010): 50 percent
People retire where they vacation, according to Frey – which is why this glittering city’s appearance on the list explains itself. For those looking for upscale retirement communities, the Vegas area is a mecca and has boomed among the 65-and-over population in recent years – two communities in the area have been nationally recognized as among the best in the country. It also has at least 10 hospitals and five colleges and universities – not to mention the Strip.