Is there a setting that will send an email to someone who completed and submitted a jotform?

I have a river float registration form that I will likely reuse next year, but people signing up for the event would like to receive a confirmation notice letting them know their form submission was received. Thank you.

Add an email field to the form and then set up a form autoresponder:

https://www.jotform.com/help/26-Creating-a-Form-Autoresponder

This will send an email to the address entered in the email field in your form.