What Ohio State University Extension Does
Ohio State University Extension is the outreach arm of the university's College of Food, Agricultural, and Environmental Sciences, and it keeps local offices in all 88 Ohio counties. If you have a sick crop, a 4-H kid with a market lamb, a money question or a community project that needs a plan, there is a county office whose job is to help. Services are built around four program areas:
- 4-H Youth Development: clubs, camps, school programs and resources for young people and families.
- Agriculture and Natural Resources: guidance on crops, livestock, farm management, conservation practices and new technology.
- Family and Consumer Sciences: healthy eating, physical activity, money management and family relationships.
- Community Development: planning, economic development and leadership tools for local communities.
The Extension page reports that its 4-H programs have reached more than 150,000 youth, that more than 4,600 people attended farm management workshops, and that 308,000 Ohioans benefited from SNAP-Ed nutrition programs. The numbers are a good sign of scale: this is not a small program tucked behind a courthouse door.
Finding Your County Office
Start with the Locate an Office tool, which lists the office, educators and contact details for each county. The Extension personnel directory helps if you already know the name of the person you need. Offices differ in staffing, so one county may have a dedicated agriculture educator while a neighbor shares one across counties. Call first and ask who handles your topic.
Ohio 4-H also has a state headquarters at the Nationwide and Ohio Farm Bureau 4-H Center, 2201 Fred Taylor Drive, Columbus, with a main number of 614-292-4444, per Ohio 4-H. For anything tied to your own county fair, though, your county office is the right first call.
4-H and the Junior Fair
For most Ohio families, Extension means 4-H, and 4-H means fair season. County Extension offices enroll members, train volunteer advisors and run the paperwork that decides whether a child can show an animal. Rules vary by county, so read your county's own materials. As one example, Meigs County's 2026 fair rules require youth to be enrolled in a 4-H or FFA species project by April 1, set eligibility from age 8 (and third grade) or age 9 through age 18, ending at 19 as of December 31 of the fair year, and require Quality Assurance training before the fair.
Other counties publish their own deadlines. Pickaway County's 2026 junior fair summary closes 4-H project changes March 1, requires livestock Skillathon judging for all 4-H and FFA exhibitors and says record books must be complete or the member is ineligible for county or state fair in that species. Our Ohio county fairs guide covers the fair side in detail.
Enroll early and ask your county office for its livestock requirement sheet before you buy an animal. Tagging and ownership dates can fall as early as December for market beef in some counties.
Help for Farms, Landowners and Gardeners
Extension's agriculture help is aimed at working producers and plain curious people alike. According to the college's Get Answers page, there are several doors to knock on:
- Ask an Expert: submit a question online and an Extension faculty or staff member replies by email. Be specific and add a photo if it helps, per the Ask an Expert page.
- Ask a Master Gardener Volunteer: for yard, landscape and garden questions.
- Ohioline: a library of fact sheets and bulletins at ohioline.osu.edu, plus publications for sale at extensionpubs.osu.edu.
- Pest Diagnostic Clinic: low-cost identification of plant diseases, plant health problems and insect issues.
- Your county educator: the right call for local conditions, because the online tool is not county-specific.
Behind those doors is a lot of applied work. The 2024 agriculture and natural resources impact report describes drought updates that drew nearly 18,000 visitors to one webpage, a C.O.R.N. newsletter with nearly 6,000 subscribers, on-farm research through eFields, eBarns and ePLUS, and more than 3,000 Master Gardener Volunteers contributing over 162,000 hours a year. The same report says Extension has trained more than 200 mental health providers and clinicians in farm stress management and Mental Health First Aid, and that the Ohio AgrAbility Program helps farmers with disabilities find funding for assistive technology and equipment changes.
Farm Science Review
Extension also helps run the Farm Science Review in London, Ohio. The impact report says staff plan field demonstrations, ag safety sessions, Gwynne Conservation Area tours and Ask the Expert talks, with at least 100 Extension professionals on site each day of the three-day event.
Family, Money and Community Help
Not everything is tractors. Family and Consumer Sciences programs cover healthy eating, physical activity and money management, and community development staff offer planning and leadership tools for local projects. If your township, fair board or farm group is trying to organize something, ask your county office what is already on the calendar before you build it from scratch.
Practical Tips
- Call your county office for anything local: soil, drainage, weed or pest problems, 4-H enrollment and fair deadlines.
- Use Ask an Expert for general questions and write the full story, with crop, location, symptoms and photos.
- Check Ohioline before you call. Many common questions already have a fact sheet.
- Sign up for your county's 4-H and ag newsletters so deadlines do not sneak up on you.
- Offices work with other agencies, so ask who else to call, such as your soil and water conservation district.
Frequently Asked Questions
Is there an Extension office in every Ohio county?
Yes. OSU Extension has local offices in all 88 counties.
How do I find my county office?
Use the Locate an Office tool at extension.osu.edu/lao, or the Extension personnel directory.
Can I ask Extension a question online?
Yes. Ask an Expert answers general questions by email, and Master Gardener Volunteers answer yard and garden questions. For county-specific questions, contact your local office.
Who runs 4-H in Ohio?
4-H is an Extension program. County offices handle enrollment and fair paperwork, and Ohio 4-H's state office is in Columbus.
Ohio Listings Covered by This Guide
- Wayne County 4-H Recognition Banquet
Annual banquet honoring Wayne County 4-H members and volunteers, held Nov. 12, 2026 in the Event Center at the fairgrounds.
- Wayne County 4-H Beef Weigh-In
Market beef project members weigh in at the Coliseum on the Wayne County fairgrounds; Jan. 24 was the weather makeup date. Held each year; the most recent date was Jan. 10, 2026.
Wooster, OH Official event details - Shelby County 4-H Market Beef Weigh-In and Tagging
Market cattle weigh-in and tagging for Shelby County junior fair exhibitors at the fairgrounds, with a Jan. 25 makeup date for bad weather. Held each year; the most recent date was Jan. 11, 2026.
Sidney, OH Official event details - Adams County 4-H Hog, Sheep and Goat Clinics
Saturday clinics for 4-H livestock exhibitors: market hog clinic, quality assurance session, then a goat and sheep clinic. Most recent date was March 7, 2026.
West Union, OH | Organizer: OSU Extension Adams County 4-H Official event details - Adams County 4-H Rabbit Clinic and Tattooing
Evening rabbit clinic with quality assurance and breeding rabbit tattooing for Adams County 4-H members. Held each year; the most recent date was April 7, 2026.
West Union, OH | Organizer: OSU Extension Adams County 4-H Official event details - Wayne County 4-H Hammer Time Clinic and Quality Assurance
Hammer Time Clinic combined with livestock Quality Assurance for Wayne County 4-H families on April 11, 2026, in the fairgrounds Coliseum.
Wooster, OH Official event details - Adams County 4-H Kids College
Daylong Kids College run by Adams County 4-H at the Extension office on the fairgrounds. Held each year; the most recent date was April 25, 2026.
West Union, OH | Organizer: OSU Extension Adams County 4-H Official event details - Adams County 4-H Market Animal Tag-In
Tag-in day for 4-H market animals at the fairgrounds: feeder calves 8 a.m. to noon, market goats 8-10 a.m., market lambs 10-11 a.m. Most recent date was May 2, 2026.
- Adams County 4-H Equine Fun Show
Afternoon fun show for 4-H horse project members, following morning equine registration day at the fairgrounds. Most recent date was May 9, 2026.
- Adams County 4-H Cloverbud Fun Day
Cloverbud Fun Day for the youngest 4-H members, running 9 a.m. to 1:30 p.m. at the fairgrounds. Held each year; the most recent date was May 27, 2026.
West Union, OH | Organizer: OSU Extension Adams County 4-H Official event details - Adams County Multi-County Horse Clinic
Four-day horse clinic for 4-H members hosted at the Adams County Fairgrounds. Held each year; the most recent dates were June 4-7, 2026.
West Union, OH | Organizer: OSU Extension Adams County 4-H Official event details - Fairfield County Swine, Lamb, Goat and Dairy Feeder Check-In
Fairfield County 4-H members check in market swine, lambs, goats and dairy beef feeders at the fairgrounds in Lancaster. Held each year; the most recent check-in was Saturday, June 27, 2026.
- Allen County 4-H Camp at Camp Palmer
Allen County 4-H overnight camp at Camp Palmer. Held each year; the most recent dates were June 22-24, 2026.
OH | Organizer: OSU Extension Allen County 4-H Official event details - Adams County 4-H Communication Contest
4-H communication contest held at the Adams County Extension office at 4 p.m. Held each year; the most recent date was June 24, 2026.
West Union, OH | Organizer: OSU Extension Adams County 4-H Official event details - Wayne County 4-H Early Project Judging
Early judging of 4-H projects was held July 7, 2026 at the fairgrounds Event Center, alongside the Outstanding Exhibitor exam, ahead of the September county fair.
Wooster, OH Official event details - Union County 4-H Dog Show
4-H dog show with showmanship and You and Your Dog question rounds in Junior, Intermediate and Senior divisions, July 11, 2026, in the fairgrounds Rabbit and Poultry Barn.
Marysville, OH Official event details - Wood County 4-H Non-Livestock Judging
Pre-fair judging of Wood County 4-H non-livestock projects at the fairgrounds on July 14, 2026, from 1 to 6 p.m., ahead of the Aug. 2-9 county fair.
Bowling Green, OH Official event details - Stark County 4-H Extravaganza
Non-livestock project judging and Cloverbud sharing circles for Stark County 4-H members at the Foltz Center in East Canton on July 16, 2026. No animals are permitted.
224 Wood St N, East Canton, OH 44730 Official event details - Wood County 4-H Livestock and Skill-A-Thon Judging
Livestock project and skill-a-thon judging for Wood County 4-H members on July 16, 2026, 1 to 6 p.m. at the fairgrounds, two days after non-livestock judging.
Bowling Green, OH Official event details - Wayne County 4-H Dairy Clinic
Evening dairy clinic for 4-H dairy project members, July 18, 2026, in the Coliseum at the Wayne County fairgrounds before the September fair.
Wooster, OH Official event details - Stark County 4-H Extravaganza Awards Ceremony
Awards ceremony for the Stark County 4-H Extravaganza held Saturday, July 18, 2026 in the Isler Pavilion between the Art Hall and Grandstand at the county fairgrounds.
305 Wertz Ave NW, Canton, OH 44708 Official event details - Wayne County 4-H Beef Live Carcass Contest
Live evaluation contest for beef carcass project animals, Aug. 27, 2026, in the Coliseum; the hanging carcass results show follows on Aug. 31.
Wooster, OH Official event details - Wayne County 4-H Goat and Lamb Live Carcass Contest
Goat and lamb carcass project members present live animals in the Goat and Sheep Arena on Aug. 29, 2026, two weeks before the Wayne County Fair.
Wooster, OH Official event details - Mission of Mary Cooperative
Mission of Mary Cooperative in Dayton runs a Wednesday 2PM to 6PM farm stand and weekly veggie box pickup from May 20 to October 28, 2026.
619 Silver Lane, Dayton, OH 45410 - Ohio State University Extension, Fairfield County
Fairfield County's Extension office in Lancaster runs 4-H, livestock check-ins and advisory events such as a craft and vendor sale for the county.
831 College Ave., Suite D, Lancaster, OH 43130 | 740-653-5419 - Ohio State University Extension, Fayette County
Fayette County's Extension office in Washington Court House handles 4-H enrollment, market animal tag-ins and Junior Fair information for local youth.
1415 US Route 22 SW, Suite 100, Washington Court House, OH 43160 | 740-335-1150 - Ohio State University Extension, Fulton County
Located in the Robert Fulton Agriculture Center in Wauseon, this office offers 4-H, agronomy and family programs for Fulton County in northwest Ohio.
8770 State Route 108, Suite A, Wauseon, OH 43567 | 419-337-9210 - Ohio State University Extension, Gallia County
Gallia County's Extension office in Gallipolis administers 4-H, animal project weigh-ins and the Gallia County Junior Fair held each August.
111 Jackson Pike, Suite 1572, Gallipolis, OH 45631 | 740-446-7007 - Ohio State University Extension, Greene County
Serves Greene County farmers, gardeners and youth from the fairgrounds in Xenia, with 4-H, agriculture and family programs plus project judging and skill-a-thons.
100 Fairground Road, Xenia, OH 45385 | 937-372-9971 - Ohio State University Extension, Guernsey County
Guernsey County's Extension office in Old Washington supports 4-H clubs, camp and Junior Fair entries along with sheep and goat schools for local producers.
335-B Old National Road, Old Washington, OH 43768 | 740-489-5300 - Ohio State University Extension, Hardin County
Hardin County's Extension office in Kenton runs 4-H project judging, teen leadership, horse show entries and food preservation education.
950 W. Kohler St., Kenton, OH 43326 | 419-674-2297 - Ohio State University Extension, Henry County
Henry County's Extension office in Napoleon offers 4-H junior leadership clubs, pesticide and fertilizer applicator training and Master Gardener volunteer programs.
Hahn Center, Suite 302, 104 E Washington Street, Napoleon, OH 43545 | 419-592-0806 - Ohio State University Extension, Highland County
Highland County's Extension office in Hillsboro runs 4-H clubs, camp, project judging schedules and farm programs including farm bill meetings.
526 John Street, Hillsboro, OH 45133 | 937-393-1918 - Ohio State University Extension, Holmes County
Holmes County's Extension office in Millersburg posts Junior Fair livestock sale orders and results for market beef, hogs, goats, lambs, rabbits and poultry.
111 East Jackson St, Millersburg, OH 44654 | 330-674-3015 - Ohio State University Extension, Huron County
Huron County's Extension office in Norwalk supports local growers with research such as sweet corn trials, alongside 4-H youth development and community education.
180 Milan Ave, Suite 1, Norwalk, OH 44857 | 419-668-8219 - Ohio State University Extension, Knox County
Knox County's Extension office in Mount Vernon coordinates 4-H and Junior Fair activities, local foods farm tours and agriculture education for the county.
160 Columbus Road, Mount Vernon, OH 43050 | 740-397-0401 - OSU Extension Adams County
Ohio State University Extension office for Adams County at 836 Boyd Ave, West Union. Runs 4-H livestock, horse, rabbit and poultry projects; open weekdays 8:30 a.m. to noon and 12:30 to 4 p.m.
836 Boyd Ave, West Union, OH 45693 | 937-544-2339 Website - OSU Extension Allen County
Ohio State University Extension office for Allen County at 2750 Harding Highway, Lima. Located on the Allen County Fairgrounds; offers 4-H camps, Cloverbud programs and teen opportunities.
2750 Harding Highway, Lima, OH 45804 | 419-879-9108 Website - OSU Extension Ashland County
Ohio State University Extension office for Ashland County at 110 Cottage St, Ashland. Offers 4-H camp, shooting sports, robotics, livestock and horse projects, and quality assurance training.
110 Cottage St, Ashland, OH 44805 | 419-281-8242 Website - OSU Extension Ashtabula County
Ohio State University Extension office for Ashtabula County at 39 Wall St, Jefferson. Provides 4-H calendars, Master Gardener volunteer resources and agriculture programs from the Ashtabula County seat.
39 Wall St, Jefferson, OH 44047 | 440-576-9008 Website
Plus 58 more. Find yours on your county's page in the Ohio directory.
Guide checked Nov. 11, 2026. Rules and dates change; confirm with the organizer.