RV Sites
Our RV sites come with water and electric connections — select sites also include sewer. Plenty of large, shaded spots to choose from, and our oversized sites handle big rigs without a problem.
Details
4.4|141 5-Star Reviews
Willow Mill Campground
Welcome to Willow Mill Campsite - a family-oriented campground on the water in Rio, Wisconsin, and one of Columbia County’s best-kept secrets since 1968.
Reserve Your Site141
5-Star Reviews
211
Sites
“Pulled in driving through no reservations they let us kind of pick our site. It was wonderful. The store had prices that were great for the grandkids. I appreciated their accommodations.”•
“What a great group of people over here. Didn't camp there due to the fact my family has property about 10 minutes up the road. However on our way into town from ohio I missed the last truck stop with water. Called ahead and for what I would say was an extremely fair price let me pull in and fill my camper up with water. The maintenance guy and filled it then went and unlocked a gate on the other side so I didnt have to try and back out or drive all the way through and around. Even though I wasn't going to be camping there the friendliness of the staff was amazing. Thank you guys”•
“The family and l had a great time at Willow Mill! Staff was super accommodating, the cabin was great, kids had a blast swimming in the pool, fishing, playing games and exploring. Looking forward to our next stay there!”•
“Great experience camping. Can't wait to see it after all the upgrades are completed. Becoming very kid/family oriented. Definitely recommend.”•
“Pulled in driving through no reservations they let us kind of pick our site. It was wonderful. The store had prices that were great for the grandkids. I appreciated their accommodations.”•
“What a great group of people over here. Didn't camp there due to the fact my family has property about 10 minutes up the road. However on our way into town from ohio I missed the last truck stop with water. Called ahead and for what I would say was an extremely fair price let me pull in and fill my camper up with water. The maintenance guy and filled it then went and unlocked a gate on the other side so I didnt have to try and back out or drive all the way through and around. Even though I wasn't going to be camping there the friendliness of the staff was amazing. Thank you guys”•
“The family and l had a great time at Willow Mill! Staff was super accommodating, the cabin was great, kids had a blast swimming in the pool, fishing, playing games and exploring. Looking forward to our next stay there!”•
“Great experience camping. Can't wait to see it after all the upgrades are completed. Becoming very kid/family oriented. Definitely recommend.”•
Willow Mill Campground in Rio, WI
Welcome to Willow Mill Campsite, a family-oriented, waterfront campsite in Rio, Wisconsin, and a Columbia County favorite since 1968. Set along County Highway SS, our lakefront property features spacious, shaded campsites with picnic tables, and relaxing water views. Guests can enjoy a seasonal pool, kayak rentals, mini golf, a game room, pavilion, and a pet-friendly dog park. The camp store offers firewood, ice, RV supplies, propane refills, snacks, and frozen foods, while practical amenities include laundry facilities, private bathrooms, and free WiFi near the store. Open through October 15, Willow Mill is a great place to relax, unwind, and enjoy the outdoors.
Located near some of Wisconsin’s top destinations, Willow Mill makes an excellent home base for exploring the area. Madison, about 30 miles southwest, offers attractions such as Henry Vilas Zoo, Capitol Square, State Street, and Lake Mendota. Wisconsin Dells, roughly 35 miles north, is famous for its waterparks, river tours, and family attractions. Closer to camp, Chandler Park provides additional outdoor recreation opportunities. Whether you’re planning a quiet camping retreat or a fun-filled family getaway, Willow Mill Campsite offers the perfect balance of comfort, recreation, and convenience.
Ways to Stay
Find Your Perfect Stay
Long Term RV Sites
Willow Mill has been a seasonal home for families since 1968, and our long term sites reflect that. Claim your spot for the season and spend your summers at Willow Mill in Columbia County.
DetailsAmenities
Everything You Need, Nothing You Don’t
Walking Trails
Playground
Dog Park
Mini Golf
Swimming Pool
Kayak Rentals
Game Room
Not sure which site is right for you? Give us a call.
(920) 992-1212Google Reviews
What Our Guests Are Saying
4.4
Based on 141 reviews
Renita Flickinger
2 weeks ago
Pulled in driving through no reservations they let us kind of pick our site. It was wonderful. The store had prices that were great for the grandkids. I appreciated their accommodations.
Mike Thibodeau
a month ago
What a great group of people over here. Didn't camp there due to the fact my family has property about 10 minutes up the road. However on our way into town from ohio I missed the last truck stop with water. Called ahead and for what I would say was an extremely fair price let me pull in and fill my camper up with water. The maintenance guy and filled it then went and unlocked a gate on the other side so I didnt have to try and back out or drive all the way through and around. Even though I wasn't going to be camping there the friendliness of the staff was amazing. Thank you guys
NATE WOODELL
a month ago
The family and l had a great time at Willow Mill! Staff was super accommodating, the cabin was great, kids had a blast swimming in the pool, fishing, playing games and exploring. Looking forward to our next stay there!
Chris Zurn
2 months ago
Great experience camping. Can't wait to see it after all the upgrades are completed. Becoming very kid/family oriented. Definitely recommend.
Renita Flickinger
2 weeks ago
Pulled in driving through no reservations they let us kind of pick our site. It was wonderful. The store had prices that were great for the grandkids. I appreciated their accommodations.
Mike Thibodeau
a month ago
What a great group of people over here. Didn't camp there due to the fact my family has property about 10 minutes up the road. However on our way into town from ohio I missed the last truck stop with water. Called ahead and for what I would say was an extremely fair price let me pull in and fill my camper up with water. The maintenance guy and filled it then went and unlocked a gate on the other side so I didnt have to try and back out or drive all the way through and around. Even though I wasn't going to be camping there the friendliness of the staff was amazing. Thank you guys
NATE WOODELL
a month ago
The family and l had a great time at Willow Mill! Staff was super accommodating, the cabin was great, kids had a blast swimming in the pool, fishing, playing games and exploring. Looking forward to our next stay there!
Chris Zurn
2 months ago
Great experience camping. Can't wait to see it after all the upgrades are completed. Becoming very kid/family oriented. Definitely recommend.
Come See Us In Person
N5830 County Hwy SS, Rio, WI 53960
(920) 992-1212
Ready to experience the top RV park in Rio, WI?
Whether you are booking a weekend getaway or settling in for longer, we would love to have you.