Diane Hendricks, co-founder and chairman of ABC Supply, tops the Forbes list, with a net worth of $4.9 billion.
Forbes released an Instagram photo for the cover of the August 31 issue of the magazine yesterday, July 11.
Jenner (20) featured on the list at number 27 and is the youngest woman on the list.
Big sister Kim Kardashian West is estimated to be worth $US 350 million and graced the cover of Forbes in July 2016 and was touted as a mobile mogul for her successful mobile phone game "Kim Kardashian: Hollywood". Her ranking at such a young age is undeniably impressive.
The story also reports Jenner, who became a mom in February, has also earned several million from her share of E!'s "Keeping Up With the Kardashians" and endorsement deals with Puma and PacSun.
After all, she grew up in one of America's richest and most-followed celebrity families.
Texas couple considers divorce to help pay for daughter's health care costs
And while there is state assistance available, there are tens of thousands of people on the waiting lists. It was nine years ago they took their wedding vows on a attractive Florida beach.
Kylie Jenner has been slammed for being called a "self-made billionaire" by Forbes.
In another tweet, she stated that if there should be someone celebrated for being "self-made", it should be Jenner's mother, Kris.
Forbes tweeted the story on Wednesday with the hashtag #SelfMadeWomen, prompting questioned whether "self-made" is an accurate description of Jenner's fortune. Yes, she is nearly a billionaire.
However, many have taken to social media to point out that the term is usually used to describe those who have worked their way up from nothing, unlike Kylie who came from a privileged background.
The online dictionary's Twitter account even went as far as to give the link for the online definition of the word "self-made".