Iowa Population 2018
As of 2018, we estimate the population in Iowa is 3.16 million.
The last official population numbers for Iowa were taken during the last nationwide census of 2010 when it was declared that 3,046,355 people lived in the state. That represented a modest rise of 4.1% compared to the 2,926,324 people recorded in the census taken in 2000. It's estimated by the Census Bureau that the population of Iowa in 2015 was 3,123,899. The growth rate between the 2010 Census and 2015 estimates is 2.55%, which ranks 29th in the nation.
The 2010 Census marked a milestone for Iowa, as it crossed the 3 million mark. This makes Iowa the 30th most populous state in the US.
Situated in the midwest United States and often referred to as the "heartland of America," Iowa is situated in the middle of the country, both in terms of location and population.
Iowa Population Density
Large areas of Iowa are flat and used as farmland and as such, the population density is relatively sparse. Overall, there is a surface area of 56,272 square miles (or 145,743 square kilometers) and this is the 26th largest state in the country in terms of land mass.
With regards to the exact density, average figures show that there are 54.5 people for every square mile. The population center is located in Marshall County in the city of Marshalltown. The most populous city in Iowa is Des Moines, with over 210,000 residents, followed by Cedar Rapids (130,405) and Davenport (102,582). Iowa now has a predominantly urban population concentrated in these areas, with 61% of the total population living in urban areas by 2000. From 2000 to 2008, urban counties grew 8.5%, while rural counties declined by 4.2%. This trend is expected to continue.
Iowa Population History
Iowa was acquired as part of the Louisiana Purchase of 1803 and formed part of Louisiana Territory, renamed Missouri Territory in 1812. Iowa became a territory in 1838 and included present-day Minnesota and the Dakotas from the Mississippi River west to the Missouri River. Iowa was admitted as a State on December 28, 1846 with substantially its present boundaries.
Census coverage began in 1840, when it was limited to eastern Iowa, except for two settlements in present-day Minnesota that were included in Clayton County. The northwestern part of the State was not fully covered in the census until 1860.