Mequon-Thiensville Historical Society

A Tax Exempt 501 (c)(3) Non-Profit Organization Since 1988

216 Green Bay Road, Ste 102  Thiensville, WI  53092

Tele:  262-242-3107     Email: 

The Mequon Thiensville Historical Society (MTHS) was founded in 1987 under the leadership of Don and Bev Silldorff with the initial support of the Mequon Men’s Club. Since its inception, the Society has depended on the community for support. The MTHS depends on people like you for volunteers, funds, donations of historic photos and documents, and members.

One person can’t do everything to support the Society, but each of us can do something. Please start by joining MTHS. For as little at $15, you can become a valued member of the Society and receive our quarterly newsletter. As you go through things in your home, please keep the Society in mind as a possible new home for your pictures, family histories, or other items related to the history of our community. If you would like to become actively involved in the work of the Society, consider becoming a volunteer in our archives, working on one of our committees, or joining our board of directors.

You can also click the DONATE button below to donate online.  (Note: You do not need a PayPal account to donate online. 

Membership applications are available at  216 Green Bay Rd., Suite 102,  Thiensville, at the Weyenberg Library in Mequon, by emailing us at, or click the link below to print a PDF copy of our application.

To apply for membership directly, please click the button below to print your membership form. Send your name, address, telephone number and email address along with a check made out to MTHS at 216 Green Bay Rd., Suite 102 Thiensville, WI 53092. Please include a note if you would like to receive your MTHS quarterly newsletter by USPS or by email. If giving a gift, please include the name and address of the recipient as well as your own information.

Membership Levels: Invidivual ($15/year), Family ($20), Contributing ($30), Business ($80) and Sustaining ($100). Membership dues and donations are fully tax deductible 501(c)(3). 

Support Us

How to Find Us

216 Green Bay Road, Suite 102,

Thiensville, WI   53092
Telephone:  1-262-242-3107


Hours: Thursdays 2 pm - 5pm or by appointment

Become a Member

Membership Levels:

  • Invidivual ($15/year),
  • Family ($20),
  • Contributing ($30),
  • Business ($80), and
  • Sustaining ($100).