Oklahoma Tax Commission
In 2000, the Oklahoma Legislature authorized the Oklahoma Tax Commission to develop and maintain a centralized digital mapping system for all Oklahoma municipal boundaries. The Oklahoma Tax Commission has worked with municipalities and the University of Oklahoma's Center for Spatial Analysis to develop this mapping system which provides the foundation for the Sales and Use Tax Rate Data System. Since 2004, almost 700 municipal boundary changes have been updated and loaded to the Oklahoma Tax Commission's Sales and Use Tax Rate Locator Data System. Approximately 100 changes are processed each year. These boundary changes affect your tax rate and can be searched by address, zip code and city name on the Oklahoma Tax Commission's site.