Every parcel of land in Ohio and Illinois has an owner of record — the person or entity that holds legal title — and that record is public. You do not need a subscription, a login, or a reason. What you need is the right office, because ownership, valuation, and the deed live in three different systems.
1. The assessor / auditor — start here
The county’s valuation office is the fastest path from an address to a parcel and its current owner. In Franklin County (Columbus) that is the County Auditor; in Cook County (Chicago) it is the County Assessor. Both let you search by address and return the parcel number (Franklin’s looks like 010-047450, Cook’s is a 14-digit PIN), the owner of record, the mailing address the tax bill goes to, the assessed value, and the property class. This is the record most people mean when they ask “who owns this house.”
What it does not reliably show is the human behind a company. If title is held by an LLC or a trust, the assessor shows the entity, not its members. That is legal and common — especially in Chicago, where the Illinois land trust is designed to keep the beneficiary’s name off the public record.
2. The recorder — the deed and the chain of title
To see how ownership passed — the deeds, the sale price on the transfer, mortgages, liens, and easements — go to the county Recorder of Deeds (Cook County) or the Recorder (Franklin County). The recorder holds the actual signed instruments. A deed will name the grantor and grantee even when the assessor only shows a trust, so the recorder is where you go when the assessor’s owner is an entity and you want the document trail. Recorder searches are usually by name or document number, and sometimes by parcel — less convenient than the assessor’s address search, which is why you start with the assessor to get the parcel first.
3. The treasurer — who actually pays the tax
The county Treasurer (Cook) or Treasurer (Franklin) holds the tax bill. The bill’s mailing name and address are a strong tell for who really controls a property, because owners keep the bill coming to themselves even when title sits in an entity. If the assessor shows an LLC but the tax bill goes to a person in a nearby suburb, that person is your lead.
The shortcut: start from the address
You can run all three searches yourself. Civic Worth’s shortcut is to resolve the address to its parcel for you and put the county context — parcel number, zoning, council district or ward, recent permits and 311 — on one page, each figure stamped with its source and date. It does not replace the official record for a title search or a closing; the assessor, recorder, and treasurer are the systems of record and do those jobs better. Use the search above to jump to a parcel, then follow through to the county for the official document.
Owner names are redacted on Civic Worth’s free tier. The county assessor, recorder, and treasurer publish ownership in full — those are the authoritative sources, and every figure here should be confirmed against them before you rely on it.