NEW YORK, May 23, 2016 /PRNewswire/ -- Senior citizens in 47 states and the District of Columbia aren't replacing enough of their pre-retirement incomes, according to a new Bankrate.com (NYSE: RATE) study. Many financial experts believe retirees need at least 70% of the income they earned in their working years, but only seniors in Hawaii, Alaska and South Carolina meet that threshold.

Nationally, the median income for those who are 65 and older is just 60% of the median income among 45 to 64 year-olds. The 15 states with the largest retirement income gaps are all located in the northern half of the country; Massachusetts has the largest gap.