Americans continue to defy tradition by staying in the workforce well past the age of 65—a trend that is running strong in some states more than others, according to a study by personal finance website SmartAsset.

"While age 65 was considered full retirement age for half a century, employment is becoming more and more common for people in their mid-60s and older," SmartAsset writes in its newly released report. "Roughly one in five Americans 65 and older remained in the labor force."

SmartAsset's study looked at the 34 largest U.S. metro areas to determine where senior citizen labor participation was the strongest as of 2021, the most recent year for which the U.S. Bureau of Labor Statistics has relevant data.

Among those cities in SmartAsset's list with the largest senior workforces, ranked from lowest to highest, are:

 

10. (tie) Phoenix
Phoenix has a senior labor force participation rate of 21.7% and it has seen a robust 1.5% increase in that category between 2019 and 2021. Average earnings for senior workers in Phoenix increased from $9,408 to $93,659 in 2021.