| Summer Reading Performance @ Magnolia Park: Steve Chaney the Ventriloquist | 07/12/2024 6:30 pm - 7:30 pm |
| Summer Reading Performance @ Butternut Creek Park: Gravity Catastrophe Science Show | 08/09/2024 6:30 pm - 7:30 pm |
| Summer Reading Kickoff Party | 06/22/2024 11:00 am - 2:00 pm |
| Student Delegation Trip Information Meeting | 11/13/2024 6:00 pm - 7:00 pm |
| Student Delegation Trip Information Meeting | 11/14/2024 7:00 pm |
| Struggles Into Superpowers with Featured Children's Author, Cindy Baldwin | 03/23/2024 2:00 pm - 3:00 pm |
| Sri Lankan New Year Celebration 2024 | 04/14/2024 8:00 am - 3:00 pm |
| Spring Out: Hillsboro Family Games | 03/19/2022 9:00 am - 12:00 pm |
| Spooktacular | 10/26/2024 3:00 pm - 8:00 pm |
| Spell The Tea: A Magical Tea Party | 10/31/2024 3:00 pm - 6:00 pm |
| Special Planning Commission Meeting | 03/22/2022 6:00 pm |
| South Hillsboro Area 2 Community Meeting | 04/28/2022 5:00 pm - 7:00 pm |
| SOLD OUT: Demet Tuncer and the United Thracians | 03/17/2023 7:30 pm - 9:30 pm |
| SOLD OUT - OMSI Science Pub: Hillsboro | 02/12/2024 7:00 pm - 9:00 pm |
| SOLD OUT - Alasdair Fraser & Natalie Haas | 09/30/2022 7:30 pm - 9:30 pm |
| Solar Now! University Conference 2014 | - |
| So, You Want to Publish a Picture Book with Hannah Holt | 03/07/2023 6:30 pm - 8:00 pm |
| So You Want to be a Teen Volunteer at the Library | 02/18/2023 12:30 pm - 2:00 pm |
| Smokey Bear's 80th Birthday Storytime Celebration | 08/09/2024 10:15 am - 11:15 am |
| Sister City Info Night | 11/17/2016 7:00 pm - 8:00 pm |
