Jefferson Highway   Association

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Upcoming JHA Conferences

Conference event information and online registration link available NOW in Upcoming Events box below Mason City, Iowa logo. If you have any questions or want assistance with your registration, please email and your email will be forwarded to the Conference Registrar.

Visit Mason City, Iowa to request Visitor's Guide before your trip.

North Iowa Information 

Jefferson Highway Heritage Byway website

2023 JHA Conference - Mason City, IA June 7-10, 2023  (Details to post late fall 2022)

2024 & 2025 JHA Conferences - Taking Proposals for Board ConsiderationinJun

If you want to get out and drive any part of the Jefferson Highway, this is the map for you! Click on the link above for map access. 

Upcoming events

JHA Site Links

Interested in our JH Historic Signage Program? Click here for our 2022 brochure that includes both historic and route signs.

Interested in our JH Grant Program? Click link for current Grant Application Form 

See historic JHA newsletters from as early as 1916, as well as other historic documents by clicking here.

Seen on the Jefferson Highway...

Jefferson Highway Association

PO Box 415

Diamond MO 64840

The Jefferson Highway Association is a 501(c)(3) Public Charity. All donations are tax deductible. Donate today. © 2013-2023. Jefferson Highway Association. All Rights Reserved.

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