What UW Extension Is
University of Wyoming Extension has served the state since 1914, and according to the UW Extension about page it has offices in all 23 counties and on the Wind River Indian Reservation. It began with agriculture and now also works on broader issues facing Wyoming people and rural communities. For most ranchers, gardeners and 4-H families, Extension means the county office down the road and the educators who work there.
The UW Extension county offices page lists 27 office locations by city, from Afton and Basin to Worland and Fort Washakie on the Wind River Indian Reservation. Each entry shows a street address and, in most cases, office hours. The page says to contact the local county office directly for a mailing address. Click through to your county name to reach that county's own website, where most offices post newsletters, forms and calendars.
Services You Can Use Right Now
Every county office is a little different, but the Sheridan County office's frequently asked questions page gives a good picture of what a Wyoming office handles.
- Soil and water testing. Sheridan County says soil and water testing is now done at the CSU Testing Laboratory, and soil sample kits are picked up at the Sheridan County office. Other counties may handle kits differently, so call before you dig.
- Radon test kits. Sheridan County says to order online or buy locally at Alpine Climate Control in Sheridan or Buffalo.
- Private pesticide applicator license. Sheridan County says this license is free. You get it by attending a training session or scheduling a test at the office.
- Commercial pesticide applicator license. Check with your employer about which tests you need, study the materials, then take the tests on site. Sheridan County lists a $25 fee, waived for government-exempt applicants.
The same site lists Agriculture and Natural Resources pages, pesticide training, newspaper articles, Cent$ible Nutrition and Community Vitality and Health programs. Many counties also publish a monthly agriculture or 4-H newsletter, which is often the fastest way to learn about a farm school, a livestock meeting or a fair deadline.
Finding Your Office
- Start at the county offices page above and find the city nearest you.
- Check the office hours listed there before driving in, especially in a small county.
- Sign up for your county newsletter. Weston County, for example, posts a monthly newsletter and a farm school flyer on its Extension site.
- If you need a specialist rather than a county educator, the UW Extension site offers a directory to locate specialists and area educators.
4-H Through Extension
4-H in Wyoming runs through the county Extension office. Laramie County's 2026 Welcome to 4-H guide is a useful example of how enrollment works.
- Enrolling. Laramie County enrolls members through ZSuite. New members create an account, find a club, choose projects and read the project guides. Membership opens October 1 and re-enrollment is in October.
- Age divisions. Based on age as of January 1: Cloverbuds 5-7, Junior 8-10, Intermediate 11-13 and Senior 14-18. The traditional program requires members to be at least 8 and not turn 19 before January 1.
- Records. Record books are due in September, and members start them early in the year.
- Livestock quality assurance. Laramie County says YQCA is required for livestock projects, starts in March and must be done by July.
Laramie County notes that 4-H and the county fair are not the same and require two separate enrollments. That is true of fair entry in other counties too, so ask your office about both. Teton County's 2026 fair book also requires a fair member to be enrolled in the project, attend at least 60 percent of meetings and file a fair entry by the deadline.
Fair Entries and Paperwork
Extension offices are usually where fair paperwork lands. Weston County's fair information page shows the pattern:
- Dog, cat and horse ID forms are due to the Extension office by May 1.
- Horse ID and safety certifications must be complete by July 3.
- Fair entries are made through the Fair Entry website and close at midnight on the posted date.
- Every static exhibit needs a completed skill statement attached.
Niobrara County's 2026 fair book sends proof of livestock ownership to the Extension office, and Sweetwater County's 2024 book lists ownership certificates due to the Extension office by June 1. If you are not sure where a form goes, the Extension office is the safe first call.
Practical Tips
- Call your county office in winter, not the week of the deadline. Beef ownership deadlines in several counties fall on February 1.
- Bring a clean, properly labeled soil sample in the container your office provides.
- Ask what your office needs from you in September (record books) and October (re-enrollment).
- Keep copies of every form you hand in.
Frequently Asked Questions
How many Extension offices does Wyoming have?
UW Extension has offices in all 23 counties and on the Wind River Indian Reservation. The county offices page lists 27 office locations.
Does Extension do soil testing?
In Sheridan County, soil kits are picked up at the Extension office and testing is done at the CSU Testing Laboratory. Ask your own county office how it works locally.
How much is a pesticide applicator license?
Sheridan County says the private applicator license is free and lists a $25 test fee for the commercial license, waived for government-exempt applicants.
When does 4-H enrollment open?
Laramie County says membership opens October 1. Other counties may differ, so check with your office.
Wyoming Listings Covered by This Guide
- Laramie Research and Extension Center
University of Wyoming Agricultural Experiment Station center at Laramie that publishes an annual research report for livestock and range producers.
Laramie, WY - Powell Research and Extension Center
University of Wyoming Agricultural Experiment Station center at Powell serving Big Horn Basin farmers with crop research.
Powell, WY - Sheridan Research and Extension Center
University of Wyoming research and extension center in Sheridan County that has served northern Wyoming agriculture for 110 years and holds an annual field day.
Sheridan, WY - Sustainable Agriculture Research and Extension Center
University of Wyoming Agricultural Experiment Station research and extension center at Lingle in the North Platte valley.
Lingle, WY - University of Wyoming Extension Albany County 4-H
Albany County Extension serves youth ages 8 to 18 through 4-H, offers private and commercial pesticide applicator licensing with proctored exams, and runs Cent$ible Nutrition classes.
3520 S. 3rd Street, Suite A, Laramie, WY 82070 | (307) 721-2571 - University of Wyoming Extension Campbell County
Campbell County Extension office handling 4-H enrollment, fair entries, horse safety certificates, livestock tagging and the monthly 4-H newsletter.
412 S. Gillette Ave, Gillette, WY 82716 | 307-682-7281 - University of Wyoming Extension Carbon County 4-H
Carbon County 4-H office coordinating clubs, county shoot, livestock tagging, horse judging and hippology practices from the Extension office in Rawlins.
215 W. Buffalo St., Rm 329, Rawlins, WY 82301 | (307) 328-2642 - University of Wyoming Extension Converse County
Converse County Extension runs 4-H and the county fair at the Douglas fairgrounds, which ends with a 4-H and FFA market sale that helps fund college scholarships.
1839 Madora Ave., Douglas, WY 82633 | (307) 358-2417 - University of Wyoming Extension Fremont County
Fremont County Extension offices in Lander (307-332-2363) and Riverton (307-857-3654) host Farm and Ranch Days and county 4-H programs.
Lander, WY | (307) 332-2363 - University of Wyoming Extension Johnson County
Johnson County Extension office on the fairgrounds, home of 4-H clubs, the Clover Chatter newsletter and the Jim Dawson 4-H Shooting Complex.
30 Fairgrounds Road, Buffalo, WY 82834 | 307.684.7522 - University of Wyoming Extension Laramie County
Laramie County Extension office running 4-H, the County Shoot and fair entries.
1400 East College Drive, Pathfinder 406, Cheyenne, WY 82007 | (307) 633-4383 - University of Wyoming Extension Lincoln County
Lincoln County Extension serves 4-H from offices in Afton (885-3132) and Kemmerer (828-4092), and publishes a monthly newsletter and fair calendar.
Afton, WY | 885-3132 - University of Wyoming Extension Natrona County Office
Home of Natrona County 4-H and ag programs, based at the fairgrounds agricultural learning center in Casper.
Agricultural Resource and Learning Center, 2011 Fairgrounds Road, Casper, WY 82604 - University of Wyoming Extension Niobrara County Office
Runs Niobrara County 4-H and youth programs from the fairgrounds in Lusk, including the county fair book and schedule.
4080 West Hwy. 20 (Fairgrounds), Lusk, WY 82225 - University of Wyoming Extension Park County Office
Serves Park County 4-H, agriculture and horticulture education, with a second office in Powell at 655 East 5th.
1501 Stampede Ave, Suite 2220, Cody, WY 82414 - University of Wyoming Extension Platte County Office
Wheatland office that runs Platte County 4-H clinics, fair entries and agriculture classes.
57 Antelope Gap Rd, Wheatland, WY 82201 | 307-322-4410 - University of Wyoming Extension Sheridan County Office
Sheridan County 4-H, livestock and ag education programs, publishing monthly 4-H newsletters.
1090 Dome Loop, Sheridan, WY 82801 - University of Wyoming Extension Sublette County Office
Pinedale office managing Sublette County 4-H, the fair entries and the youth livestock sale paperwork.
9660 US Highway 191, Pinedale, WY 82941 | (307) 367-4380 - University of Wyoming Extension Sweetwater County Office
Sweetwater County 4-H and ag education office, housed at Western Wyoming Community College in Rock Springs.
Western Wyoming Community College, Room 1227, 2500 College Drive, Rock Springs, WY 82901 - University of Wyoming Extension Teton County Office
Jackson office that supports Teton County 4-H, the fair book and youth livestock programs.
255 West Deloney, Jackson, WY 83001 - University of Wyoming Extension Uinta County Office
Evanston office offering Uinta County 4-H, youth development and agriculture education.
228 9th Street, Evanston, WY 82930 - University of Wyoming Extension Washakie County Office
Worland office delivering Washakie County 4-H and ag education programs.
1200 Culbertson Ave., Suite G, Worland, WY 82401 - University of Wyoming Extension Weston County Office
Newcastle office for Weston County 4-H, fair deadlines and horse, dog and livestock project forms.
204 West Main Street, Newcastle, WY 82701 | (307) 746-3531 - University of Wyoming Extension, Albany County Office
University of Wyoming Extension office at 3520 S. 3rd Street, Suite A, Laramie. Handles 4-H, Master Gardener classes, yard visits and the Cent$ible Nutrition Program out of Laramie.
3520 S. 3rd Street, Suite A, Laramie, WY 82070 | 307-721-2571 Website - University of Wyoming Extension, Big Horn County Office
University of Wyoming Extension office at 208 South 5th Street, Basin. Basin office serving Big Horn Basin ranchers, growers and 4-H families with horticulture, livestock and youth programs.
208 South 5th Street, Basin, WY 82410 - University of Wyoming Extension, Campbell County Office
University of Wyoming Extension office at 412 S. Gillette Ave., Gillette. Gillette office supporting Powder River Basin ranchers, gardeners and 4-H members in Campbell County.
412 S. Gillette Ave., Gillette, WY 82716 - University of Wyoming Extension, Carbon County Office
University of Wyoming Extension office at Carbon Building, Room 393, Rawlins. Rawlins office for Carbon County ranchers, small-acreage owners and 4-H clubs, housed in the county building.
Carbon Building, Room 393, Rawlins, WY 82301 - University of Wyoming Extension, Converse County Office
University of Wyoming Extension office at 1839 Madora Ave., Douglas. Douglas office near the Wyoming State Fair Park, serving Converse County ranchers, gardeners and 4-H youth.
1839 Madora Ave., Douglas, WY 82633 - University of Wyoming Extension, Crook County Office
University of Wyoming Extension office at 309 Cleveland Street, Sundance. Sundance office in the Black Hills corner of Wyoming, helping Crook County producers and 4-H families.
309 Cleveland Street, Sundance, WY 82729 - University of Wyoming Extension, Fremont County (Lander)
University of Wyoming Extension office at 450 N. 2nd Street, Room 315, Lander. Lander branch of the Fremont County Extension team, covering the Popo Agie valley with ag, nutrition and 4-H support.
450 N. 2nd Street, Room 315, Lander, WY 82520 Website - University of Wyoming Extension, Fremont County (Riverton)
University of Wyoming Extension office at 818 S Federal Blvd, Suite 300, Riverton. Riverton branch of the Fremont County Extension team, serving irrigated farms and 4-H members in the Wind River basin.
818 S Federal Blvd, Suite 300, Riverton, WY 82501 Website - University of Wyoming Extension, Goshen County Office
University of Wyoming Extension office at 4516 US Hwy. 26/85, Torrington. Torrington office serving the irrigated North Platte valley, with a parking lot used by a Thursday farmers market.
4516 US Hwy. 26/85, Torrington, WY 82240 - University of Wyoming Extension, Hot Springs County Office
University of Wyoming Extension office at 328 Arapahoe, Thermopolis. Thermopolis office offering ranch, garden and 4-H programs for Hot Springs County families.
328 Arapahoe, Thermopolis, WY 82443 - University of Wyoming Extension, Johnson County Office
University of Wyoming Extension office at 30 Fairgrounds Rd, Buffalo. Buffalo office at the fairgrounds that hosts the Johnson County Fair and Rodeo and runs 4-H and livestock programs.
30 Fairgrounds Rd, Buffalo, WY 82834 | 307-684-7522 - University of Wyoming Extension, Laramie County Office
University of Wyoming Extension office at 1400 E. College Drive, Pathfinder Building, Room 406D, Cheyenne. Cheyenne office in the Pathfinder Building serving the state capital area with horticulture, 4-H and small-farm help.
1400 E. College Drive, Pathfinder Building, Room 406D, Cheyenne, WY 82007 - University of Wyoming Extension, Lincoln County (Afton)
University of Wyoming Extension office at 150 S. Washington St., Afton. Afton office in Star Valley, supporting dairy, hay and livestock producers and 4-H youth.
150 S. Washington St., Afton, WY 83110 Website - University of Wyoming Extension, Lincoln County (Kemmerer)
University of Wyoming Extension office at 215 HWY 233, Suite B, Kemmerer. Kemmerer office on the southern end of Lincoln County, serving ranchers and 4-H members west of the Hams Fork.
215 HWY 233, Suite B, Kemmerer, WY 83101 Website - University of Wyoming Extension, Natrona County Office
University of Wyoming Extension office at Agricultural Resource and Learning Center, 2011 Fairgrounds Road, Casper. Casper office at the Agricultural Resource and Learning Center, also home to the Central Wyoming Fairgrounds.
Agricultural Resource and Learning Center, 2011 Fairgrounds Road, Casper, WY 82604 - University of Wyoming Extension, Niobrara County Office
University of Wyoming Extension office at 4080 West Hwy. 20 (Fairgrounds), Lusk. Lusk office at the Niobrara County Fairgrounds, serving one of the least populated ranching counties in the state.
4080 West Hwy. 20 (Fairgrounds), Lusk, WY 82225 | 307-334-3534 - University of Wyoming Extension, Park County (Cody)
University of Wyoming Extension office at 1501 Stampede Ave, Suite 2220, Cody. Cody office on Stampede Avenue serving the Shoshone and Clarks Fork valleys.
1501 Stampede Ave, Suite 2220, Cody, WY 82414
Plus 10 more. Find yours on your county's page in the Wyoming directory.
Guide checked Nov. 11, 2026. Rules and dates change; confirm with the organizer.