The Viking Lake campground is one of the most popular in southwest Iowa. The spacious, shady campground is located on the lakeshore. There are 120 campsites (94 with electrical hookups, 22 full service, 9 buddy sites, and 26 non-electrical), modern rest rooms and showers and a trailer dump station. A playground is located in the campground. Starting February 13, 2006 advance campsite reservations can be booked through the park reservation system. Half of the campsites are still available for self-registration on a first-come, first-serve basis.

The boat concession near the swimming area has bait for sale and motor boats, paddle boats and pontoon boats for rent. A concrete boat ramp is nearby and a docking area is a short distance away in a well protected cove. Rental spaces are available on an annual reservation basis. Any size boat motors may be used on Viking Lake provided they are operated at "no wake" speeds.