Parcels in St. Louis County, Missouri

St. Louis County, Missouri is home to 990,911 residents. Land Owl's parcel layer records the following within the county boundary — Parcel boundaries mapped: 375,724. Share of the county’s parcels with a mapped boundary: 93.6%. Parcels with an owner record: 100%. Parcels with an assessed value: 98.3%. Parcels with a mailing address: 99.9%. County acres per mapped parcel: 0.9 acres. The figures on this page are derived from the same data the map renders, so they always agree. A free Land Owl account adds ownership records, flood zones, soils, wetlands and topography over the same view.

Frequently asked questions

How many parcels are there in St. Louis County, Missouri?

Land Owl maps 375,724 parcel boundaries in St. Louis County, Missouri, an average of 0.9 acres of county land per parcel. Parcel counts move as land is split and merged, so the county assessor's own figure is the one of record.

Is this parcel map free to use?

Yes. This map is free to view. A free Land Owl account unlocks the other data layers, parcel boundaries and ownership records.

Where does this data come from?

Land Owl compiles parcel boundaries and assessment records from county assessor and GIS offices and matches them into one national layer. Counties publish on their own schedules, so a recent split, merger or sale may not have reached the public record yet. The county's own records are authoritative.

Is the owner's name shown on this map?

Not on this page. Ownership records, mailing addresses and assessed values are in the Land Owl app behind a free account.