Official State of Iowa Website

Certified Census Counts

Certification by Iowa Secretary of State

Whenever the population of any county, township, or city is referred to in any Iowa law, the official population is the last preceding certified federal census unless otherwise provided

  • The Office of the Secretary of State certifies federal census counts for the Iowa's counties, townships, and cities
  • Allocation of state funds according to population is based on the  counts as certified by the Secretary of State
  • For more information about certifying population counts by the office of the Iowa Secretary of State:

Special Census Count Certification

When a special federal census is taken by any city, the mayor and council are to certify the census as soon as possible to the secretary of state and to the treasurer of state.

Published Changes to Certified Counts

To see a list of corrected decennial counts, GUPCP counts, special census counts, and the dates on which they were certified: