Klamath Falls, is a city in Klamath County, Oregon, United States. Originally called Linkville when George Nurse founded the town in 1867, after the Link River on whose falls this city sits. The name was changed to Klamath Falls circa 1892, and is sometimes called K Falls. The population was 19,462 at the 2000 census, although the city limit signs on the edges of town list it as near 40,000, counting suburbs.

Klamath Falls is home to many outdoor winter and summer activities. The nearby Running Y Ranch Resort, features a golf course designed by Arnold Palmer, an ice skating arena Bill Collier Community Ice Arena, trail riding, and overlooks Upper Klamath Lake, the largest natural lake in the Pacific Northwest. There is also a canoe trail through the wildlife refuge at Rocky Point.

Klamath Falls is located on the Pacific Flyway, and large numbers of waterfowl and raptors are seen at all times of the year. The largest concentration of Bald Eagles in the lower 48 winter in Bear Valley, just 10 miles west of Klamath Falls, near Keno, and the American White Pelican shows in great numbers in summer.

Crater Lake National Park is 50 miles north of Klamath Falls and the 33 mile rim drive circumnavigating the lake is a favorite of cyclists. Winter cross country skiing in the park is also very popular. The more than mile high Crater Lake Marathon is an annual event.