One-third have almost no retirement savings

A telephone survey conducted by Employee Benefit Research Institute and Greenwald and Associates found 28 percent of respondents have less than $1,000 in savings, not counting their primary residence or defined benefit plans.

According to USA Today, 57 percent said they have less than $25,000 prepared for retirement.

"People keep saying, 'I'm not saving so I'll plan on retiring much later,' but often times for reasons they can't control, people are not able to retire as late as they want," said Jack VanDerhei, EBRI's research director and co-author of the 2015 Retirement Confidence Survey.

Read more from USA Today.