| 3 LAKES CONSTRUCTION, LLCFort Klamath, OR · Active | Fort Klamath, OR | LLC | Nov 13, 2014 | Active |
| K2 CATTLE CO.,LLC, A LIMITED LIABILITY COMPANY OF CALIFORNIAFort Klamath, OR · Active | Fort Klamath, OR | LLC | Dec 19, 2014 | Active |
| FORT KLAMATH LODGEFort Klamath, OR · Active | Fort Klamath, OR | Other | Feb 14, 2003 | Active |
| JACOX RANCHES, LLCFort Klamath, OR · Active | Fort Klamath, OR | LLC | May 1, 2017 | Active |
| NICHOLSON CONSTRUCTIONFort Klamath, OR · Active | Fort Klamath, OR | Other | Oct 20, 1988 | Active |
| BORBA LAND & LIVESTOCK LLCFort Klamath, OR · Active | Fort Klamath, OR | LLC | Oct 31, 2018 | Active |
| TRAJAN CORPFort Klamath, OR · Active | Fort Klamath, OR | Corporation | Jan 4, 2019 | Active |
| HORSE POWER NORTHWESTFort Klamath, OR · Active | Fort Klamath, OR | Other | Feb 20, 2019 | Active |
| ASPEN INN, LLCFort Klamath, OR · Active | Fort Klamath, OR | LLC | Oct 30, 2003 | Active |
| CRATER LAKE COUNTRY SUITESFort Klamath, OR · Active | Fort Klamath, OR | Other | Mar 22, 2021 | Active |
| WOOD RIVER RANCH LLCFort Klamath, OR · Active | Fort Klamath, OR | LLC | Apr 30, 2021 | Active |
| ONE BAR LIVESTOCK, LLCFort Klamath, OR · Active | Fort Klamath, OR | LLC | Aug 9, 2021 | Active |
| FOUR ASPENS LLCFort Klamath, OR · Active | Fort Klamath, OR | LLC | Sep 28, 2021 | Active |
| VALHALLA RANCHFort Klamath, OR · Active | Fort Klamath, OR | Other | Nov 24, 2021 | Active |
| LEAH GHIELMETTI INCFort Klamath, OR · Active | Fort Klamath, OR | Corporation | Jan 26, 2023 | Active |
| KLAMATH OUTDOOR SCIENCE SCHOOLFort Klamath, OR · Active | Fort Klamath, OR | Nonprofit | Mar 26, 2004 | Active |
| FORT KLAMATH COMMUNITY CHURCHFort Klamath, OR · Active | Fort Klamath, OR | Nonprofit | Dec 18, 2023 | Active |
| MEROLA LIVESTOCK LLCFort Klamath, OR · Active | Fort Klamath, OR | LLC | Jan 15, 2025 | Active |
| OREGON ROYAL STURGEON COMPANY, LLCFort Klamath, OR · Active | Fort Klamath, OR | LLC | Mar 11, 2025 | Active |
| OWENS VENTURES LLCFort Klamath, OR · Active | Fort Klamath, OR | LLC | May 23, 2025 | Active |
| SNOW REMOVAL MADE EASY LLCFort Klamath, OR · Active | Fort Klamath, OR | Other | Dec 8, 2025 | Active |
| JO'S MOTEL AND CAMPGROUNDFort Klamath, OR · Active | Fort Klamath, OR | Other | Apr 28, 2005 | Active |
| FORT KLAMATH CEMETERY ASSOCIATIONFort Klamath, OR · Active | Fort Klamath, OR | Nonprofit | Jul 8, 1926 | Active |
| UPPER KLAMATH FARMSFort Klamath, OR · Active | Fort Klamath, OR | Other | Aug 3, 1992 | Active |
| CIVIC IMPROVEMENT CLUB OF FORT KLAMATHFort Klamath, OR · Active | Fort Klamath, OR | Nonprofit | Jul 26, 1928 | Active |
| HAWKINS CATTLE COMPANYFort Klamath, OR · Active | Fort Klamath, OR | Other | Nov 9, 2007 | Active |
| ROGER NICHOLSON CATTLE CO.Fort Klamath, OR · Active | Fort Klamath, OR | Corporation | May 27, 2008 | Active |
| LLOYD NICHOLSON CATTLE CO.Fort Klamath, OR · Active | Fort Klamath, OR | Corporation | May 27, 2008 | Active |
| SUN MOUNTAIN RANCH, L.L.C.Fort Klamath, OR · Active | Fort Klamath, OR | LLC | Oct 24, 1996 | Active |
| PRODUCTIVE TIMBERLAND LLCFort Klamath, OR · Active | Fort Klamath, OR | LLC | Nov 14, 2008 | Active |
| AG-LAND RESOURCES LLCFort Klamath, OR · Active | Fort Klamath, OR | LLC | May 27, 2009 | Active |
| FORT KLAMATH CRITICAL HABITAT LANDOWNERS, INC.Fort Klamath, OR · Active | Fort Klamath, OR | Nonprofit | Oct 28, 1998 | Active |
| NICHOLSON INVESTMENTS, L.L.C.Fort Klamath, OR · Active | Fort Klamath, OR | LLC | Feb 12, 1999 | Active |
| CRYSTAL CREEK ANGLERSFort Klamath, OR · Active | Fort Klamath, OR | Other | Apr 22, 1999 | Active |
| CRATER LAKE RESORTFort Klamath, OR · Active | Fort Klamath, OR | Other | Nov 4, 1999 | Active |
| HEPPER CONSTRUCTION, LLCFort Klamath, OR · Active | Fort Klamath, OR | LLC | Jun 27, 2012 | Active |
| PINECONE HOLDINGS LLCFort Klamath, OR · Active | Fort Klamath, OR | LLC | Jul 27, 2012 | Active |
| FIRCONE HOLDINGS LLCFort Klamath, OR · Active | Fort Klamath, OR | LLC | Jul 27, 2012 | Active |
| WAMPLER RANCHES, LLCFort Klamath, OR · Active | Fort Klamath, OR | LLC | Sep 10, 2012 | Active |
| GOOSE NEST RANCHES, LLCFort Klamath, OR · Active | Fort Klamath, OR | LLC | Dec 20, 2012 | Active |
| LIMNES LAND COMPANY LLCFort Klamath, OR · Active | Fort Klamath, OR | LLC | Mar 7, 2013 | Active |
| NBCC, LLCFort Klamath, OR · Active | Fort Klamath, OR | LLC | Jul 26, 2002 | Active |
| AGRI WATER, LLCFort Klamath, OR · Active | Fort Klamath, OR | LLC | Jul 26, 2002 | Active |