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Our Chapters

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IDA’s regional and local chapters are an important part of our success.

Staffed by volunteers from around the globe, our chapters act as local bases for IDA, helping more of us to have better nights. IDA chapters organize events such as dark sky festivals, conferences and star parties, while working to educate their communities and government officials about the importance of protecting night skies, eco-friendly outdoor lighting, and much more.

Currently, we have more than 50 chapters around the world. This includes more than 20 international chapters representing 5 continents.

Find a Chapter

Can’t find an IDA chapter near you?

Bulletin: IDA is not accepting applications for new chapters at this time. We are reviewing our chapter guidelines and until this process is completed, all new chapter applications will be placed on hold. We thank you for your patience during this period and will be sure to let you know when we are ready to begin receiving applications again. Please feel free to direct any questions to Susan Ciarniello. You can call the IDA office at 520 293-3198 or email her directly at


Consider starting one by assembling a team of like-minded individuals in your area. Chapters are independent advocates for IDA and our mission that specialize in local action.

IDA doesn’t fund chapters, but money for special projects is occasionally made available. Chapters are considered part of our organization, which means they enjoy the many benefits of IDA’s 501(c)(3) nonprofit status.

Because chapters are part of IDA, they must adhere to IDA’s mission and bylaws. In addition, they are required to submit annual reports to IDA and are bound to uphold the rules of Section 501(c)(3) of the United States Internal Revenue Code of 1987.

Download a Chapter Application and the IDA Chapter Handbook.

To be considered for chapter status, please forward your completed applications to IDA headquarters by email to or by mail at:

International Dark-Sky Association
3223 N. First Avenue
Tucson, Arizona 85719

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