Franklin County is the most populous county in Ohio and anchors the Columbus metro. This report maps 492,012 parcels into 2,103 ownership concentration clusters using publicly available county auditor records, including Columbus, Dublin, Westerville, Hilliard, Gahanna, Worthington, and Upper Arlington. Ohio market value is used directly (no assessment-to-market multiplier), and homestead-verified owner-occupancy flags enable clean absentee detection.
Largest Ohio dataset — 492K parcels. Franklin exceeds every other Ohio county in the catalog. 2,103 concentration clusters identified from Franklin County Auditor records with full market-value appraisals.
$27.01 billion clustered value. The largest total clustered value of any Ohio county in the catalog — reflecting Columbus's position as a top-20 US metro and the center of Ohio's institutional and corporate real-estate activity.
Homestead-verified absentee detection. Ohio's senior/disabled homestead exemption and 2.5% owner-occupancy reduction surface as explicit flags in the Auditor data. Parcels without these flags are candidates for absentee analysis, producing a cleaner absentee dataset than address-match alone.
Columbus metro cluster density. The City of Columbus sits inside Franklin. Intown neighborhoods concentrate multi-entity LLC networks differently than suburban Dublin or Upper Arlington. The report surfaces both urban-core and suburban cluster patterns.
Pairs with the Ohio Statewide bundle. Columbus ownership frequently extends into other Ohio metros. The Ohio Statewide 5-County Bundle covers 1.57M parcels across Columbus, Cincinnati, Dayton, Canton, and Akron.
Executive dashboard, geographic treemap, scatter analysis, municipality breakdown across Columbus, Dublin, Westerville, Hilliard, Gahanna, Worthington, and Upper Arlington, top clusters by two ranking methods, entity rosters, CSV quick-start guide, methodology, and legal disclaimer.
Every entity in every cluster. Filter by owner state, entity count, parcel count, or market value.
Franklin + Hamilton + Montgomery + Stark + Summit. 1.57M parcels. 10,902 clusters. Save $1,296.
356,045 parcels. 2,964 clusters. Cincinnati core. Pairs with Franklin.
254,697 parcels. 2,223 clusters. Dayton.
265,858 parcels. 1,895 clusters. Akron.