If you live within the United States, your first local chapter membership is included in your national dues. Each additional chapter you join requires a payment of $10.
To join another chapter, please contact ONS Customer Relations at email@example.com or at 866-257-4667, option 2. You can also reach us by selecting "Submit a request" within the ONS Help Center. Business hours are Monday through Friday, 8:30 am–5 pm EST.