According to research firm Reach Advisors, the median full-time salary for women between 22 and 30 is 8 percent higher than those of the men in their peer group.
They're doing even better in Sacramento, San Diego and Los Angeles.
The survey says education is the key to women's success -- especially among minorities.
"African-American women and Hispanic women are significantly more likely, twice as likely as their male peers to graduate from college and that's what's driving such a big difference," James Chung said.
The study found that women who earn the most in their twenties are usually single and childless, and that is because highly-educated women tend to marry and have children later.