Independent · official-source research
Find the right DBA filing office.
The answer changes by state, county, and legal entity. Start with your location and we’ll point you to the government source—not a paid filing funnel.
Find your filing path- 35
- state + DC guides
- 15
- county guides
- 247
- official sources
- 16
- states in research
Filing path finder
Start with the state.
We’ll show county choices only when that state has local filing guides. Then choose the legal entity that already exists.
Primary directory
Browse state guides
35 researched state and District of Columbia guides. Each guide separates filing rules by entity type.
ALAlabamatrade name · 1 routeAKAlaskabusiness name · 1 routeAZArizonatrade name · 1 routeARArkansasfictitious name · 4 routesCACaliforniafictitious business name · 1 routeCOColoradotrade name · 4 routesCTConnecticuttrade name · 1 routeDCDistrict of Columbiatrade name · 1 routeFLFloridafictitious name · 1 routeGAGeorgiatrade name · 1 routeHIHawaiitrade name · 1 routeIDIdahoAssumed Business Name · 1 routeILIllinoisassumed name · 4 routesINIndianaassumed business name · 4 routesIAIowatrade name · 4 routesKYKentuckyassumed name · 1 routeLALouisianatrade name · 4 routesMEMaineassumed name · 4 routesMDMarylandtrade name · 1 routeMAMassachusettsbusiness certificate · 1 routeMIMichiganassumed name · 1 routeMNMinnesotaassumed name · 1 routeMOMissourifictitious name · 1 routeNENebraskatrade name · 1 routeNJNew Jerseytrade name · 4 routesNYNew Yorkassumed name · 4 routesNCNorth Carolinaassumed business name · 1 routeOHOhiotrade name · 1 routePAPennsylvaniafictitious name · 1 routeSCSouth Carolinaassumed name · 4 routesTNTennesseeassumed name · 2 routesTXTexasassumed name · 4 routesVAVirginiafictitious name · 1 routeWAWashingtontrade name · 1 routeWIWisconsintrade name · 4 routes
Local layer
County guides, grouped by state
Counties are listed beneath the state that governs the broader filing system. Use a county guide only when your location and entity route call for it.
Coverage in progress
Still being researched
We do not publish a thin state page just to fill the map. These guides stay unlinked until their filing paths and official evidence pass review.
- DEDelaware
- KSKansas
- MSMississippi
- MTMontana
- NVNevada
- NHNew Hampshire
- NMNew Mexico
- NDNorth Dakota
- OKOklahoma
- OROregon
- RIRhode Island
- SDSouth Dakota
- UTUtah
- VTVermont
- WVWest Virginia
- WYWyoming
01Start with the entity
An LLC may file somewhere different from a sole proprietor.
02Follow the jurisdiction
State rules come first; county guidance sits underneath the state.
03Verify the source
Every asserted filing fact links back to government evidence.