Percentage of U.S. adults 18 â 25 who have at least one tattoo: 36 %: Percentage of U.S. adults 26 â 40 who have at least one tattoo: 40 %: Total number of Americans that have at least one tattoo: 45 million: Number of tattoo parlors in the U.S. 21,000: Average cost of a small tattoo: $ 45: Average cost of a large tattoo: $150 / hour: Percentage of U.S. population who have covered up a tattoo with another tattoo: 5 %: Percentage of people with tattoos who claim they are addicted to ink: 32 %