It's no secret that Olympians can make a lot of money, and Katie Ledecky has an impressive net worth for her age. According to Celebrity Net Worth, the 24-year-old swimmer has a net worth of $4 million. She's turned down countless endorsements in the past which would have skyrocketed this net worth even further, but she's still a multi-millionaire in her early 20s, which is incredibly impressive.

While her stance on endorsements used to be stricter, she has begun accepting them. Important to note here is that Ledecky reportedly wasn't able to accept endorsements at the 2016 Olympics due to her technically still being an NCAA student athlete. In 2018, though, Ledecky signed her first major endorsement deal with TYR, a swimwear brand. This deal will last six years, over which she'll receive a total of $7 million.

This also marked another pivotal turn in her career: As of 2018, Ledecky went pro, which is going to boost her net worth in the long run as well. She made it to the Olympics in both 2012 and 2016, per SwimSwam, and she's slated to return to the Tokyo Olympics in 2021 as part of the U.S.' roster, per The Washington Post.