Jill Michelle Dillard (née Duggar; born May 17, 1991) is an American author and former television personality.

She is known for her appearances on TLC as part of the reality television shows 19 Kids and Counting (2008–2015) and Counting On (2015–2017), and in the 2023 Amazon Prime documentary Shiny Happy People, about her upbringing within Bill Gothard's financially and sexually exploitative Institute in Basic Life Principles (IBLP) and Advanced Training Institute (ATI) organizations, for which her parents were important proselytizers.

[3][4] Dillard was born in Tontitown, Arkansas, as the fourth child and the second daughter of Jim Bob and Michelle Duggar.

[22] In June 2015 on The Kelly File, Dillard identified herself as one of the girls whom her oldest brother Joshua Duggar had molested as a teen.

[26] In 2017, Jill and her sister Jessa sued Springdale and Washington County officials for releasing the police reports.

In February 2022, the judge dismissed the case, saying that the officials had broken the law merely out of negligence rather than intention and thus had immunity.