| Date | Event |
| 9/7/2026 | Labor Day - Chamber Office will be Closed more info... |
| 9/25/2026 | Join the Ottawa Chamber of Commerce for Ladies Night Out. Registration begins at 1pm at Legacy Square, 125 S Walnut St. more info... |
Events available for Registration... 2025 Mayor's Tree Lighting Ornament 10/21/2025 - 5/31/2026 register for this event... OAYP Bowling Night! 5/8/2026 register for this event... 2026 Treasures in Ottawa - June 6th 6/6/2026 - 6/6/2026 register for this event... |
Events in the month of September 2026 | ||||||||||||||||||||||||||||||||||||||||||||||