The cartography section of the Assessor's Office is responsible for tracking ownership of all real property in the county and maintaining a complete set of tax lot maps. All documents recorded in the County Clerk's Deed Records are reviewed to determine if they involve a change in property ownership or property description.  This section has been converting from mylar mapping to digital mapping and has incorporated many layers of data for our GIS program. 

The ORMAP (the Oregon Map) project will develop a statewide property tax parcel base map that is digital, publicly accessible, and continually maintained. This move from paper to computer-based mapping will help and improve the administration of the property tax system.  For more information visit ORMAP.

Forms and Publications

Frequently Asked Questions

230 Strand St.
Columbia County Courthouse Annex
St. Helens ,
Fax: 503-397-5153

Monday - Friday
8:30 a.m. to 5:00 p.m
We are closed the second Thursday of each month from 8:30 a.m. to 12:00 p.m. for staff work sessions and training.
Sue Martin