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Join ADCA

Have you ever noticed the doorknob that you grasp and turn to enter a historic home or building? Antique doorknobs are little pieces of sculpture cast in bronze, brass, copper, iron, steel, glass, or ceramic — with ornate doorplates and hardware to match.

“The ADCA is comprised of a few hundred active members who collect not only antique doorknobs, but also other types of associated antique hardware and collectibles.”

What Your Membership Includes

Knob Database

Access photos and information about 3,000+ doorknobs and related hardware on our website.

The Doorknob Collector

Receive our bi-monthly newsletter featuring hardware articles and company histories.

Hardware Catalog Archive

Browse the largest archive of antique hardware catalogs from the 1800s and early 1900s.

Annual Convention

Attend our annual members convention where collections are displayed and traded.

Members Facebook Group

Join our private Facebook group for information sharing and Q&A with fellow collectors.

Membership Levels

Individual memberships which exceed $30 per year may be tax-deductible donations to the ADCA, a 501(c)(3) charitable organization.

Supporting

$50/year

Sustaining

$100/year

Business

$100/year

Benefactor

$500/year

Join Online

Join by Mail

Instructions

  1. 1

    Download and print the membership application form below.

  2. 2

    Complete the form and write a check payable to ADCA.

  3. 3

    Mail the completed form and check to the address on the right.

Download Application Form

Mailing Address

ADCA2527 Gough Street
San Francisco, CA 94123

Questions?

Email us at adcaoffice@aol.com

Members registered through MemberPlanet who have renewed previously: you may also mail your renewal check to the address above.

Already a Member?

If you've received an invitation email, sign in to access your member portal, view your membership status, and browse the full knob database.

Sign In to Member Portal

Haven't received an invitation? Contact us at adcaoffice@aol.com.