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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

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.

Walk Kansas Returns for 2024

walk kansas

This team-based, eight-week program will help you live a healthier lifestyle: be more active, eat more fruits and vegetables, reduce stress, and have fun with your coworkers, friends and family. Learn more

Volunteer Income Tax Assistance (VITA):
February 7 to April 13

volunteer income tax assistance

VITA is a free tax return preparation service for qualified individuals making $64,000 a year or less. Learn more.

Knowledge for Life: Our monthly newsletter 

Knowledge for Life is full of current research and tips from our agents, plus a list of upcoming events and helpful reminders.

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Do I Need a Soil Test?

Soil fertility is important for good plant growth. Testing is the only way to know nutrient levels.

A test gives you accurate informa­tion about the type and amount of fertilizer or amendment to apply. Applying proper amounts decreases runoff that can pollute waterways. This protects the envi­ronment and saves you money.

A soil test measures pH and available nutrients.Johnson County homeowners are eligible to receive one free test (Package #1)  per household per calendar year.

Proper collection of a soil sample is important for accuracy and analysis. Follow these steps for taking good samples.

2024 Healthy Yards Expo

healthy yards expoSaturday, April 13, 9 AM to 2 PM
Shawnee Civic Centre

This free, family friendly event will show you how to make greener choices for lawn and home. Learn more