Individual & Business Memberships & Sponsors

Becoming a Member of the Montana Chapter is as simple as joining the IDA.

We are currently working on categories for Business Memberships as well as Individual and Business Sponsors who want to help keep the stars in Montana’s Big Sky. Check back soon!

More Ways to Support Safer Lighting and Protect our Starry Nights

Join Montana IDA

The IDA depends on membership dues and donations for two-thirds of its funding! Help the IDA support our Montana Chapter by joining.



Donate to IDA

Please contribute today to help us continue the fight against light pollution. IDA’s success depends on your generosity – this is why you are an essential partner in our shared mission to protect the night sky.


Get Involved!

We can’t protect Montana’s big night sky without your help! You can help us protect our heritage of star-filled skies by spreading the word about light pollution to your neighbors, communities and public officials.