| Open Mic Night | 02/06/2022 2:00 PM - 4:00 PM | |
| Open Mic for Teens | 07/14/2018 7:00 PM | |
| Open House/Ribbon Cutting | 03/24/2016 4:00 PM - 7:00 PM | |
| Open House for Downtown Bartlett Businesses | 06/10/2019 5:00 PM - 7:00 PM | |
| One Giant Leap for Mankind and Bartlett! | 07/31/2019 7:00 PM | |
| On the Road to Glory: Fred Lorenzen | 05/25/2016 7:00 PM - 8:30 PM | |
| Olive Oil 101 | 03/24/2019 2:00 PM | |
| Older & Bolder Adventure Trip - Starved Rock | 10/09/2016 7:00 AM - 7:00 PM | |
| Older & Bolder Adventure Trip - Maquoketa Caves | 11/06/2016 7:00 AM - 7:00 PM | |
| Older & Bolder Adventure Trip - Fossil Hunting | 09/11/2016 7:00 AM - 7:00 PM | |
| Oktoberfest with Arts in Bartlett | 10/13/2017 7:00 PM - 9:00 PM | |
| Oktoberfest Dinner | 10/28/2017 5:00 PM | |
| Oktoberfest Dinner | 10/27/2019 11:00 AM - 3:00 PM | |
| Oktoberfest "To Go!" | 10/11/2020 12:00 PM - 6:00 PM | |
| Oktoberfest | 09/30/2022 5:00 PM - 10:30 PM | |
| Oktoberfest | 10/01/2022 12:00 PM - 10:30 PM | |
| Oktoberfest | 09/27/2024 | |
| Oktoberfest | 09/28/2024 | |
| October Birthday | 10/11/2017 10:00 AM - 11:00 AM | |
| Objects Tell Their Bartlett Stories | 06/19/2019 7:00 PM | |
