The Auditor Books and Pages layer shows the boundaries of the Hamilton County Auditor's Tax Maps Book and Page. These maps act as an index to show property (parcels) throughout Hamilton County, Ohio. The Book numbers correspond to the villages, cities, and townships in the county and are further subdivided into page numbers for each distinct map. Up until the advent of G.I.S. technology these individual maps were maintained by the Hamilton County Engineer in large books.
Each property in Hamilton County is assigned a parcel number. The first characters of a parcel number reflect the Book and Page to which it belongs.

This layer displays the property boundaries owned by Hamilton County. Information regarding each property can be found on the Hamilton Auditor's County, by entering the owner's name, the parcel ID, or the street address. The auditor's website provides regarding the tax district, the school district, the owner name and address, the land use, the appraisal information, the assessed value, and the property description, amongst other information.This layer doesn't display when zoomed out beyond 1:18,000.

This layer represents the boundaries of the 2020 Census Tracts in Hamilton County.

Census tracts are: Small, relatively permanent statistical subdivisions of a county. Uniquely numbered in each county with a numeric code. About 4,000 inhabitants – Minimum Population – 1,200 – Maximum Population – 8,000. Designed to be relatively permanent over time. Any changes are documented so data can be compared from decade to decade.

Geospatial data about Cincinnati Police Districts. Export to CAD, GIS, PDF, CSV and access via API.

Tax districts layer display tax districts in Hamilton County. There are 119 tax districts countywide.

Cincinnati Hillside Overlay Districts layer displays hillside areas where the existence of a 20% slope, is combined with the KOPE geologic formation. The Hillside Overlay District states regulations are necessary to establish standards to assist in the development of land and structures in existing hillside areas so that development will be compatible with the natural environment and respect the quality of the urban environment in those locations where the hillsides are of significant public value as determined by the City policy as outlined in the document “A Hillside Protection Strategy for Greater Cincinnati”, 1991.