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    What an officially ‘Christian nation’ looked like in America

    November 4, 2025
    Rob Boston

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Protect church-state separation for generations to come

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Planning for the future and creating the legacy you wish to leave is one of the most effective ways to ensure a lasting impact. Making a gift in your will or living trust, known as a bequest, can guarantee that your legacy endures. Your gift may be a specific dollar amount, a percentage of your estate or the remainder after all other provisions are specified.

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Federal tax ID number: 53-0184647

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What is AU's Tax ID Number?

AU’s Tax ID number is:

53-0184647

Where do I mail donations?

Donations can be mailed to:

1310 L. St. NW Ste 200

Washington, DC 20005

I'm already giving AU monthly gifts, but need to change my financial info. How do I do that?

Thank you so much for your generous year-round support of church-state separation! Please visit our self-service portal to update your payment information or upgrade your amount (to lower or cancel your enrollment, please email with your request). If you would rather make changes by phone, please call us at 202-466-3234 x213.

Christian Nationalism is a dangerous ideology based on the false belief that America was founded as a Christian nation for white Christians and that our laws and policies must protect white Christian privilege and power.

Christian Nationalists believe that they are the “true Americans,” deny the separation of church and state promised by our Constitution, and oppose equality for people of color, women, LGBTQ+ people, religious minorities, and the nonreligious.

Are there other ways to give to AU?

Yes! Check them out here.

How do I notify AU of a mailing or email address update?

Please visit our Self Service Portal. You can also email updates or call 202-466-3234 x213.

Has AU filed a nonprofit disclosure with my state?

Certain states require written disclosures for nonprofit organizations soliciting contributions. Click here to learn more.

I have a question about my membership / contribution that wasn't answered here. Who can help me?

Please contact us via email at [email protected], or call (202) 466-3234 x213. If you call before 9 AM or after 5 PM Eastern, please leave a message in voice mailbox 213, and we will respond as soon as possible.

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Americans United for Separation of Church and State is a nonpartisan, not-for-profit educational and advocacy organization that brings together people of all religions and none to protect the right of everyone to believe as they want — and stop anyone from using their beliefs to harm others. We fight in the courts, legislatures, and the public square for freedom without favor and equality without exception.

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Washington, DC 20005

(202) 466-3234
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“Americans United for Separation of Church and State,” “Americans United” and “Church & State” are registered trademarks of Americans United for Separation of Church and State.

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