The Delavan Lake Improvement Association was founded in 1895 and organized with this purpose: to help protect and preserve the lake and all land around it; to represent those who own its property, and to provide a wholesome and relaxing environment for our friends and visitors. Since then, the DLIA has maintained the primary focus of a ‘watchdog’ role, seeking to identify potential and existing issues that affect water quality and the long-term health of the lake. 

It is our Association’s goal to forge strong ties with agencies such as the Wisconsin DNR, the U.S. Geological Survey, governing bodies at the State, County & Local levels, and other local & regional Lake Associations & Conservancies to help ensure timely attention to the condition and the needs of Delavan Lake.

We would welcome your participation and support as a member of the DLIA.

Membership Application



Summer Address: 

Summer Telephone Number:

Off-Season Address: 

Off-Season Telephone  Number:

Email address:

  Membership Levels: Your Membership Dues Are Now Tax Deductible! Tax ID# 23-7105919.

   Patron Membership - $100 per year​
   Sustaining  Membership - $50 per year 
   Family Membership - $40 per year
   Individual Membership - $30 per year 

(Fall, Winter & Spring if different than Summer) 
To Pay By Mail: Please click on the Membership Application Form link below to print the form and mail your check.
Membership dues
TAX DEDUCTIBLE DONATION -  Help us help the lake by making a donation to support our Cover Crop Program. This program keeps the lake clean by providing local farmers in the Delavan Lake watershed compensation support to remove run-off land from cultivation that flows into the lake. Less runoff results in less sedimentation and farm fertilizer entering the lake! 

The Delavan Lake Improvement Association is a nonprofit public charity recognized as tax-exempt by the IRS under Section 501(c)(3).
Your contribution is tax deductible to the extent allowed by law. No goods or services were provided in exchange for your generous donation. Tax ID# 23-7105919.
Delavan Lake Improvement Association
Help Us Help the Lake! 
NEW DLIA POLICY: Newsletters & Lake Alerts will be sent by email due to the cost of mailings. If you want to receive DLIA communications,  be sure to include your email in the contact information. The DLIA does not sell or distribute emails. Emails are strictly used for DLIA communications.

Become a Member of the DLIA
NOTE:  All DLIA & lake communications are sent through email.