Susan Brown of the National Center for Family and Marriage Research at Bowling Green State University in Ohio found people with at least a bachelor's degree were least likely to form a family before age 25, while those with a high-school equivalency diploma were most likely.
"Clearly, education appears to have a significant effect on family formation experiences, slowing down that process of either forming a union or having a birth," Brown said in a statement.
The researchers said the delay is due in part because people often don't want to marry until they are economically set.
2014: NFL Cheerleaders [PHOTOS]
CDC: Get your flu vaccine