| INGLE BUTTE RANCHES, INC.Mount Vernon, OR · Active | Mount Vernon, OR | Corporation | May 1, 1974 | Active |
| KIMBALL, LLCMount Vernon, OR · Active | Mount Vernon, OR | LLC | Oct 1, 2002 | Active |
| SUDS PUBMount Vernon, OR · Active | Mount Vernon, OR | Other | Aug 17, 2015 | Active |
| MCKENNA RENTALSMount Vernon, OR · Active | Mount Vernon, OR | Other | Feb 9, 2016 | Active |
| III PEAKS CONTRACTING LLCMount Vernon, OR · Active | Mount Vernon, OR | LLC | Feb 12, 2016 | Active |
| JOHN DAY VALLEY MENNONITE CHURCHMount Vernon, OR · Active | Mount Vernon, OR | Other | Mar 15, 2016 | Active |
| HTCMount Vernon, OR · Active | Mount Vernon, OR | Other | Sep 8, 2016 | Active |
| RUGGED CREEK NURSERYMount Vernon, OR · Active | Mount Vernon, OR | Other | Dec 16, 2016 | Active |
| COMMUNITY PRESBYTERIAN CHURCH OF MT. VERNONMount Vernon, OR · Active | Mount Vernon, OR | Nonprofit | Apr 27, 1978 | Active |
| A T SAGASER TRUCKINGMount Vernon, OR · Active | Mount Vernon, OR | Other | Jan 18, 2017 | Active |
| BELLYACRES TWISTED STITCHERYMount Vernon, OR · Active | Mount Vernon, OR | LLC | Mar 3, 2017 | Active |
| FRONTIER EQUIPMENT, INC.Mount Vernon, OR · Active | Mount Vernon, OR | Corporation | Mar 24, 2003 | Active |
| HIGH DESERT ENGINEERING, LLCMount Vernon, OR · Active | Mount Vernon, OR | LLC | May 9, 2017 | Active |
| TY'S MOBILE WELDING & FABRICATIONMount Vernon, OR · Active | Mount Vernon, OR | Other | Jul 14, 2017 | Active |
| THE FEATHER FORGEMount Vernon, OR · Active | Mount Vernon, OR | Other | Nov 9, 2017 | Active |
| ELSI LEGAL LLCMount Vernon, OR · Active | Mount Vernon, OR | LLC | Dec 29, 2017 | Active |
| OBSIDIAN ARCHERY DISTRIBUTOR LLCMount Vernon, OR · Active | Mount Vernon, OR | LLC | Mar 16, 2018 | Active |
| SAUL'S MOBILE PRESSURE WASHING LLCMount Vernon, OR · Active | Mount Vernon, OR | LLC | Mar 19, 2018 | Active |
| BOX T RANCH, LLCMount Vernon, OR · Active | Mount Vernon, OR | LLC | Oct 10, 2018 | Active |
| MASSON, LLCMount Vernon, OR · Active | Mount Vernon, OR | LLC | Oct 10, 2018 | Active |
| CROSSROADS COMMUNITY COUNSELINGMount Vernon, OR · Active | Mount Vernon, OR | Nonprofit | Nov 21, 2018 | Active |
| LEAF AND STEELMount Vernon, OR · Active | Mount Vernon, OR | Other | Oct 29, 2019 | Active |
| FRONTIER CROSSROADS, INC.Mount Vernon, OR · Active | Mount Vernon, OR | Corporation | Jan 7, 2020 | Active |
| HARRISON RANCH PRODUCEMount Vernon, OR · Active | Mount Vernon, OR | Other | Mar 24, 2020 | Active |
| SUDS LLCMount Vernon, OR · Active | Mount Vernon, OR | LLC | Apr 21, 2020 | Active |
| MARCIEL CONSTRUCTION, INC.Mount Vernon, OR · Active | Mount Vernon, OR | Corporation | Aug 29, 2003 | Active |
| MARCIEL WELL DRILLING & PUMPS, INC.Mount Vernon, OR · Active | Mount Vernon, OR | Corporation | Sep 16, 2003 | Active |
| MARCIEL MANAGEMENT, INC.Mount Vernon, OR · Active | Mount Vernon, OR | Corporation | Sep 16, 2003 | Active |
| HANK IN THE WAY SOAP COMPANYMount Vernon, OR · Active | Mount Vernon, OR | Other | Nov 4, 2020 | Active |
| NW CONVOCATIONMount Vernon, OR · Active | Mount Vernon, OR | Nonprofit | Jul 14, 2021 | Active |
| HARPER CONTRACTING, L.L.C.Mount Vernon, OR · Active | Mount Vernon, OR | LLC | Sep 10, 2021 | Active |
| OREGON TELEPHONE CORPORATIONMount Vernon, OR · Active | Mount Vernon, OR | Corporation | Apr 20, 1914 | Active |
| RALLY NETWORKSMount Vernon, OR · Active | Mount Vernon, OR | Other | Feb 10, 2022 | Active |
| HOT MUD CONSULTING, LLCMount Vernon, OR · Active | Mount Vernon, OR | LLC | Mar 14, 2022 | Active |
| TANNER GEORGE TRUCKING LLCMount Vernon, OR · Active | Mount Vernon, OR | LLC | Mar 30, 2022 | Active |
| DAKOM TRUCKING, LIMITED LIABILITY COMPANYMount Vernon, OR · Active | Mount Vernon, OR | LLC | Jul 19, 2022 | Active |
| BLUE MOUNTAIN DITCH COMPANYMount Vernon, OR · Active | Mount Vernon, OR | Corporation | May 4, 1916 | Active |
| CIRCLE X LLCMount Vernon, OR · Active | Mount Vernon, OR | LLC | Oct 13, 2022 | Active |
| FRAZIER CLEANING CO LLCMount Vernon, OR · Active | Mount Vernon, OR | LLC | Nov 15, 2022 | Active |
| TOBY THOMAS CONTRACTING, LLC.Mount Vernon, OR · Active | Mount Vernon, OR | LLC | Dec 13, 2022 | Active |
| SHADOW FORGED MANAGEMENT, LLCMount Vernon, OR · Active | Mount Vernon, OR | LLC | Dec 28, 2022 | Active |
| 5M TRUCKING L.L.C.Mount Vernon, OR · Active | Mount Vernon, OR | LLC | Jan 3, 2023 | Active |
| FRONTIER REPAIR AND TOWINGMount Vernon, OR · Active | Mount Vernon, OR | Other | Jan 28, 2023 | Active |
| APPLE ROAD HONEY CO LLCMount Vernon, OR · Active | Mount Vernon, OR | LLC | Aug 14, 2023 | Active |
| SJ PROPERTIESMount Vernon, OR · Active | Mount Vernon, OR | Other | Aug 23, 2023 | Active |
| WILSON'S WELDING & FABRICATION LLCMount Vernon, OR · Active | Mount Vernon, OR | LLC | Oct 25, 2023 | Active |
| L.Q. CONSULTING LLCMount Vernon, OR · Active | Mount Vernon, OR | LLC | Nov 16, 2023 | Active |
| DARRELL MCKROLA G.C.Mount Vernon, OR · Active | Mount Vernon, OR | Other | Jan 9, 2024 | Active |
| BB GUNSMount Vernon, OR · Active | Mount Vernon, OR | Other | Feb 26, 2024 | Active |
| TAYDENQUIN LODGES INC.Mount Vernon, OR · Active | Mount Vernon, OR | Corporation | Apr 1, 2024 | Active |