On September 2, 2019, Miss Illinois USA 2019 Alexandra Plotz crowned Olivia Pura as the new Miss Illinois USA 2020. Miss Illinois Teen USA 2019 A'Maiya Allen crowned the new Miss Illinois Teen USA 2020. The new titleholders won the opportunity to represent Illinois at Miss USA 2020 and Miss Teen USA 2020 pageants.
The Top 5 for Miss Illinois USA 2020 were:
1st Runner-up - Gina Melchiorri
2nd Runner-up - Abby Foster
3rd Runner-up - Missy Galvin
4th Runner-up - Michela Moe
The Top 16 for Miss Illinois USA 2020 were:
On September 2, 2019, Victoria Blair Rhemrev was crowned Miss Illinois Teen USA 2020!
The Top 5 contestants for Miss Illinois Teen USA 2020 were:
1st Runner-up - Suliana Solano
2nd Runner-up - Havanna Heeg
3rd Runner-up - Lauren Ridgway
4th Runner-up - Victoria Eakins
The remaining Top 14 contestants for Miss Illinois Teen USA 2020 were:
Emma Kate Houchens