CHICAGO (AP) — Nearly one-quarter of Americans say they never plan to retire, according to a poll that suggests a disconnection between individuals' retirement plans and the realities of aging in the workforce.

Experts say illness, injury, layoffs and caregiving responsibilities often force older workers to leave their jobs sooner than they'd like.

According to the poll from The Associated Press-NORC Center for Public Affairs Research, 23% of workers, including nearly 2 in 10 of those over 50, don't expect to stop working. Roughly another quarter of Americans say they will continue working bey...