Share While Baby Boomers and Generation X are now the bosses at many companies, more than 25% of the workforce is younger than 30. This means that Generation Z (born between 1997 and 2012) and millennials (born between 1981 and 1996) are emerging as the generations to soon comprise the largest percentage of workers. Starting your career at a young age provides more time to build up your savings and create a retirement plan with a financial advisor. Some cities offer younger workers more opportunities for gainful employment and SmartAsset crunched the numbers to find out where younger employees make up the biggest percentage of the local workforce.