The reality TV star began her social justice bids by petitioning President Donald Trump over the release of Tennessee grandmother Alice Marie Johnson in June last year.
Since the 63-year-old was pardoned by Trump after meeting Kim at the White House, she has joined campaigns to get other prisoners released.
Kim joined attorney Brittany K Barnett and has secretly funded the Buried Alive Project, which has helped free 17 inmates who were handed huge jail sentences for low-level drug offences as part of its 90 Days of Freedom project.
Some of Kim's campaigns have been well-publicized, such as former sex slave Cyntoia Brown, Jeffrey Stringer and Johnson, who spent 21 years in prison for a non-violent drug offense.
But now the amount of inmates on the list is longer than first thought, it has been revealed.
Last week Kim helped get Stringer from Miami out of prison after he was locked up for more than two decades for a low-level drug case.
The reality star tweeted on Friday that she helped fund his case after he had been sentenced to life in prison.