| LINDSAY CONSTRUCTIONJohn Day, OR · Active | John Day, OR | Other | Mar 13, 2008 | Active |
| PAJARITA AVIATION LLCJohn Day, OR · Active | John Day, OR | LLC | Apr 22, 2008 | Active |
| BIOSMILE INC.John Day, OR · Active | John Day, OR | Corporation | Apr 23, 2008 | Active |
| CROSS COUNTRY SERVICESJohn Day, OR · Active | John Day, OR | Other | Feb 22, 2001 | Active |
| UNITED METHODIST CHURCH OF JOHN DAY, OREGONJohn Day, OR · Active | John Day, OR | Nonprofit | Oct 18, 1954 | Active |
| HEART OF GRANT COUNTYJohn Day, OR · Active | John Day, OR | Nonprofit | Sep 9, 2008 | Active |
| HCVC, INC.John Day, OR · Active | John Day, OR | Corporation | Dec 23, 1996 | Active |
| FRANKLIN REALTY, INC.John Day, OR · Active | John Day, OR | Corporation | Dec 21, 2001 | Active |
| HARNEY SEED & SUPPLY LLCJohn Day, OR · Active | John Day, OR | LLC | Oct 30, 2008 | Active |
| JOHN DAY, OREGON, LODGE NO. 1824 OF THE BENEVOLENT AND PROTECTIVE ORDER OF ELKS OF THE UNITED STATES OF AMERICAJohn Day, OR · Active | John Day, OR | Nonprofit | Dec 19, 1955 | Active |
| AW CONSTRUCTION LLCJohn Day, OR · Active | John Day, OR | LLC | Dec 5, 2008 | Active |
| BLUE MOUNTAIN HOSPITAL DISTRICTJohn Day, OR · Active | John Day, OR | Other | Dec 23, 2008 | Active |
| HUMAN ENERGY CONCEALMENT SYSTEMS, LLCJohn Day, OR · Active | John Day, OR | LLC | Mar 4, 2009 | Active |
| BOULDER RIDGE CONSTRUCTION, LLCJohn Day, OR · Active | John Day, OR | LLC | Mar 11, 2009 | Active |
| GRANT COUNTY SNOWBALLERS, INCORPORATEDJohn Day, OR · Active | John Day, OR | Nonprofit | Jan 29, 1987 | Active |
| PREFERRED GROUP, INC.John Day, OR · Active | John Day, OR | Corporation | Sep 3, 1997 | Active |
| THE FIRST CHRISTIAN CHURCH OF JOHN DAY, OREGONJohn Day, OR · Active | John Day, OR | Nonprofit | Apr 17, 1958 | Active |
| GARDNER ENTERPRISES, INC.John Day, OR · Active | John Day, OR | Corporation | Jul 23, 1959 | Active |
| TWEEDLE DEE, LLCJohn Day, OR · Active | John Day, OR | LLC | Sep 22, 2009 | Active |
| IRON TRIANGLE L.L.C.John Day, OR · Active | John Day, OR | LLC | May 6, 1998 | Active |
| THE OUTPOST PIZZA PUB & GRILLJohn Day, OR · Active | John Day, OR | Other | Sep 28, 2009 | Active |
| BIRCH SPRING RANCH, LLCJohn Day, OR · Active | John Day, OR | LLC | Oct 15, 2009 | Active |
| FAMILIES FIRST PARENT RESOURCE CENTERJohn Day, OR · Active | John Day, OR | Other | Nov 18, 2009 | Active |
| MALHEUR LUMBER COMPANYJohn Day, OR · Active | John Day, OR | Other | Jan 4, 2010 | Active |
| AMERICAN LEGION AUXILIARY ELLIS TRACY #77John Day, OR · Active | John Day, OR | Nonprofit | Oct 7, 1998 | Active |
| RADINOVICH GENERAL CONTRACTING, INC.John Day, OR · Active | John Day, OR | Corporation | Oct 14, 1998 | Active |
| SUNSHINE TRUCKING CO., INC.John Day, OR · Active | John Day, OR | Corporation | May 15, 1961 | Active |
| BETTER BLOOMS AND GARDENSJohn Day, OR · Active | John Day, OR | Other | Mar 16, 1999 | Active |
| SIGH MASSAGEJohn Day, OR · Active | John Day, OR | Other | Apr 20, 2010 | Active |
| NORTHWEST BIG GAME, INC.John Day, OR · Active | John Day, OR | Corporation | May 10, 1999 | Active |
| RUDE LOGGING LLCJohn Day, OR · Active | John Day, OR | LLC | May 4, 2010 | Active |
| FRIENDS OF KAM WAH CHUNG & CO. MUSEUMJohn Day, OR · Active | John Day, OR | Nonprofit | Mar 12, 2002 | Active |
| LOOP RANCH, LLCJohn Day, OR · Active | John Day, OR | LLC | Aug 12, 2010 | Active |
| CALVARY CHAPEL JOHN DAYJohn Day, OR · Active | John Day, OR | Nonprofit | Sep 21, 1999 | Active |
| JOHN DAY MARKETJohn Day, OR · Active | John Day, OR | Other | Sep 20, 2010 | Active |
| PRIME TIME VIDEO AND ELECTRONICSJohn Day, OR · Active | John Day, OR | Other | Oct 27, 1999 | Active |
| JUNIPER SINGERSJohn Day, OR · Active | John Day, OR | Nonprofit | Dec 8, 1999 | Active |
| RTG, LLCJohn Day, OR · Active | John Day, OR | LLC | Nov 9, 2010 | Active |
| JD POWER AND OUTDOORJohn Day, OR · Active | John Day, OR | Other | Dec 10, 2010 | Active |
| MCCLELLAN CONTRACTING, INC.John Day, OR · Active | John Day, OR | Corporation | Jan 7, 2011 | Active |
| LEN'S PHARMACYJohn Day, OR · Active | John Day, OR | Other | Jan 11, 2011 | Active |
| MINION AIR, INC.John Day, OR · Active | John Day, OR | Corporation | Jan 26, 2011 | Active |
| WJ LLCJohn Day, OR · Active | John Day, OR | LLC | Mar 17, 2011 | Active |
| LIL BUDDY CONSTRUCTION LLCJohn Day, OR · Active | John Day, OR | LLC | Mar 23, 2011 | Active |
| POLISHEDJohn Day, OR · Active | John Day, OR | Other | Mar 23, 2011 | Active |
| FAMILIES FIRST OF GRANT COUNTY, INC.John Day, OR · Active | John Day, OR | Nonprofit | Jun 15, 2000 | Active |
| GRANT COUNTY 4-H ASSOCIATIONJohn Day, OR · Active | John Day, OR | Nonprofit | Jun 8, 1965 | Active |
| JEROME NATURAL RESOURCE CONSULTANTS, INC.John Day, OR · Active | John Day, OR | Corporation | Apr 19, 2002 | Active |
| PJT, INC.John Day, OR · Active | John Day, OR | Corporation | May 23, 2011 | Active |
| HIGH TOWER PREFABJohn Day, OR · Active | John Day, OR | Other | Oct 13, 2000 | Active |