Venice could claim the title as the oldest non-retirement city in America. The median age in Venice is 66.7, according to data recently released by the U.S. Census Bureau. It ranks sixth nationally among cities with populations above 20,000 — but with an asterisk:  According tot he Herald-Tribune, the five cities ahead of Venice, such as The Villages near Orlando, are designed as retirement communities. Not only does more than half of the population of Venice qualify for Social Security and Medicare, but the population of younger people is tiny: Only 4.3 percent of the population is in the 25-34 age group, and just 2.2 percent are ages 15 to 19.