Historically, there are a small percentage of cases where a wrong geographic boundary or coding of a housing unit was used to produce the official census population and housing counts for a local area. Geocoding errors can occur when a living quarter such as a house, apartment, or military vessel, is placed in an incorrect location. There may also be processing errors.
The Census Bureau works with tribal, state, and local governments to help ensure a complete and accurate count during each census. Elected officials may request a review of their jurisdiction’s census counts. During the review process, the Census Bureau will not collect any additional data. If a review results in a change, the bureau issues official revised counts to the affected government. All data, geography, and technical documentation notes and errata are published.