| ALTA FIT, LIMITED LIABILITY COMPANYOntario, OR · Active | Ontario, OR | LLC | Dec 11, 2009 | Active |
| ALTA FARMS, LIMITED LIABILITY COMPANYOntario, OR · Active | Ontario, OR | LLC | Dec 11, 2009 | Active |
| WARRINGTON IRRIGATION, INC.Ontario, OR · Active | Ontario, OR | Corporation | Aug 31, 1998 | Active |
| FINDLEY LAND AND LIVESTOCK, LLCOntario, OR · Active | Ontario, OR | LLC | Dec 28, 2009 | Active |
| A P TRANSPORT LLCOntario, OR · Active | Ontario, OR | LLC | Jan 4, 2010 | Active |
| SAINT ALPHONSUS MEDICAL CENTER-ONTARIO, INC.Ontario, OR · Active | Ontario, OR | Nonprofit | Jan 26, 2010 | Active |
| SNAKE RIVER ECONOMIC DEVELOPMENT ALLIANCE, CORP.Ontario, OR · Active | Ontario, OR | Nonprofit | Jan 27, 2010 | Active |
| GREYSTONE BUILDERS, LLCOntario, OR · Active | Ontario, OR | LLC | Mar 1, 2001 | Active |
| ONTARIO HIGH SCHOOL CLASS OF 1965 FOUNDATIONOntario, OR · Active | Ontario, OR | Nonprofit | Feb 22, 2002 | Active |
| HOPE PREGNANCY CENTER OF TREASURE VALLEYOntario, OR · Active | Ontario, OR | Other | Feb 11, 2010 | Active |
| TURF MASTER SPRINKLERSOntario, OR · Active | Ontario, OR | Other | Feb 12, 2010 | Active |
| FIRST CHURCH OF THE NAZARENE, ONTARIO, OREGONOntario, OR · Active | Ontario, OR | Nonprofit | May 9, 1961 | Active |
| HAREN-WOOD CREMATORYOntario, OR · Active | Ontario, OR | Other | Jan 19, 1999 | Active |
| FOUR RIVERS VETERINARY CLINIC, INC.Ontario, OR · Active | Ontario, OR | Corporation | Jan 22, 1999 | Active |
| TREASURE VALLEY PARAMEDICS FOUNDATIONOntario, OR · Active | Ontario, OR | Nonprofit | Jan 29, 1999 | Active |
| FRIENDS OF THE ONTARIO COMMUNITY LIBRARY, INC.Ontario, OR · Active | Ontario, OR | Nonprofit | Mar 11, 1987 | Active |
| TREASURE VALLEY WINDSHIELD INC.Ontario, OR · Active | Ontario, OR | Corporation | Mar 5, 2002 | Active |
| ROY & JACK HASEBE, LLCOntario, OR · Active | Ontario, OR | LLC | May 5, 2010 | Active |
| ONTARIO FERAL CAT PROJECTOntario, OR · Active | Ontario, OR | Nonprofit | May 18, 2010 | Active |
| LH VENTURES, LLCOntario, OR · Active | Ontario, OR | LLC | May 7, 1999 | Active |
| SUNSHINE ESTATES, L.L.C.Ontario, OR · Active | Ontario, OR | LLC | May 10, 1999 | Active |
| BRUCE DAVIS PLUMBINGOntario, OR · Active | Ontario, OR | Other | May 28, 2010 | Active |
| ONTARIO ROCK & LANDSCAPE SUPPLIESOntario, OR · Active | Ontario, OR | Other | Jul 6, 2010 | Active |
| ACACIA LODGE NO. 118, A. F. & A. M., ONTARIO, OREGONOntario, OR · Active | Ontario, OR | Nonprofit | Dec 10, 1962 | Active |
| THE BETHANY PRESBYTERIAN CHURCH OF ONTARIO, OREGON OF THE PRESBYTERIAN CHURCH (U.S.A.)Ontario, OR · Active | Ontario, OR | Nonprofit | Dec 20, 1962 | Active |
| SANDHU CORPORATIONOntario, OR · Active | Ontario, OR | Corporation | Jul 15, 2010 | Active |
| TREASURE VALLEY COMMUNITY COLLEGE FOUNDATIONOntario, OR · Active | Ontario, OR | Nonprofit | Dec 21, 1962 | Active |
| NORTH VERDE AUTO SALVAGE, LLCOntario, OR · Active | Ontario, OR | LLC | Jul 19, 1999 | Active |
| MARTARANO HOUSE AFHOntario, OR · Active | Ontario, OR | Other | Sep 1, 2010 | Active |
| EASTERN OREGON CENTER FOR INDEPENDENT LIVINGOntario, OR · Active | Ontario, OR | Nonprofit | Aug 25, 1999 | Active |
| HOMETOWN TOYOTAOntario, OR · Active | Ontario, OR | Other | Aug 25, 2010 | Active |
| TREASURE VALLEY VENDING, INC.Ontario, OR · Active | Ontario, OR | Corporation | Sep 29, 1999 | Active |
| SAINT ALPHONSUS MEDICAL CENTER -- ONTARIOOntario, OR · Active | Ontario, OR | Other | Sep 13, 2010 | Active |
| DISABLED AMERICAN VETERANS CHAPTER D-DAY 18Ontario, OR · Active | Ontario, OR | Nonprofit | Oct 21, 2010 | Active |
| DENIS PRICE LAND LEVELINGOntario, OR · Active | Ontario, OR | Other | Sep 28, 2010 | Active |
| OUTFITTERS QUARTERMASTER SUPPLYOntario, OR · Active | Ontario, OR | Other | Jan 1, 2000 | Active |
| FAMILY EYE CENTER, P.A., PROFESSIONAL CORP.Ontario, OR · Active | Ontario, OR | Corporation | Nov 8, 2010 | Active |
| ELDREDGE FURNITURE INC.Ontario, OR · Active | Ontario, OR | Corporation | Feb 25, 1964 | Active |
| JAY B. WETTSTEIN, DMD, PCOntario, OR · Active | Ontario, OR | Corporation | Jan 10, 2000 | Active |
| MILLS MANOR APARTMENTSOntario, OR · Active | Ontario, OR | Other | Mar 29, 2002 | Active |
| LAZY SAGE RANCHOntario, OR · Active | Ontario, OR | Other | Jan 18, 2011 | Active |
| HELP THEM TO HOPEOntario, OR · Active | Ontario, OR | Nonprofit | Jan 21, 2011 | Active |
| ONTARIO DINER, LLCOntario, OR · Active | Ontario, OR | LLC | Mar 10, 2000 | Active |
| LIFE LONG LEARNERS OF THE LOWER TREASURE VALLEYOntario, OR · Active | Ontario, OR | Nonprofit | Jan 20, 2011 | Active |
| WEST WIND PRODUCEOntario, OR · Active | Ontario, OR | Other | May 1, 2000 | Active |
| MEEKERS USED CAR'SOntario, OR · Active | Ontario, OR | Other | Apr 11, 2000 | Active |
| FARMERS' AERIAL APPLICATORS, INC.Ontario, OR · Active | Ontario, OR | Corporation | May 7, 1987 | Active |
| POTRILLOS, INC.Ontario, OR · Active | Ontario, OR | Corporation | Feb 24, 2011 | Active |
| WETTSTEIN FARMS, INC.Ontario, OR · Active | Ontario, OR | Corporation | Feb 23, 1965 | Active |
| MIRAMONTE'S JEWELRYOntario, OR · Active | Ontario, OR | Other | Jun 6, 2000 | Active |