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Johnson County

Research-based Information You Can Trust — Localized for your needs

Johnson County
11811 S. Sunset Drive
Suite 1500
Olathe, KS 66061

Office Hours:

Monday - Friday,
8:30 a.m. - 5 p.m.

(913) 715-7000
(913) 715-7005 fax

Map to our office

K-State Research and Extension is committed to making its services, activities and programs accessible to all participants. Reasonable accommodations for persons with disabilities may be requested by contacting Johnson County Extension at (913)715-7000. Notify staff of accommodation needs as early as possible.

Kansas State University Agricultural Experiment Station and Cooperative Extension Service

K-State Research and Extension is an equal opportunity provider and employer.

Bringing K-State to Johnson County


"In a gentle way, you can shake the world."

                                                              - Mahatma Gandhi

Here at the K-State Johnson County Extension Office, we pledge to serve our community in a variety of ways, from health and nutrition, to agricultural and horticultural needs, money management, and much more. We exist to help others through Kansas State University knowledge and information in order to better serve our communities, specializing in problem-solving, education, and community service.

Since 1917, the Johnson County Extension Office has dedicated our time and resources to ensure that the community of Johnson County continues to grow and thrive.


What's New?

International Master Gardener Conference June 18-23 2023


International Master Gardener Conference Public Events

Tour of Private Gardens, June 17 and 18, 2023.

Evening Featured Speakers-Enjoy presentations about Gardening in England, Monarch Migration and Tales of a World Renowned Plant Explorer.

Garden Thyme Marketplace (Trade Show)- A Trade Show Featuring Garden Related Products.


Free Soil Tests for Johnson County Residents



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