Auditions for Nickelodeon shows take place in a few select states, including California, Colorado, Florida, Georgia, Illinois, Michigan, New York, Texas and Washington. 2015Auditions.com lists upcoming audition locations for various networks.
Nickelodeon does not show up often on the 2015Auditions.com site, but other kid-friendly networks that appear on this site include Cartoon Network, Comedy Central, Disney and ABC. Local casting calls can also be found via this website, and users can sign up to receive emails announcing new acting auditions and related opportunities in their respective areas. These auditions aren't only for TV shows, but include movies and music videos as well.