Iowa Population Demographics and Statistics
The American Community Survey (ACS), conducted by the U.S. Census Bureau, publishes detailed estimates of the population each year. Unlike the Census—which is an exact count of people and households every ten years—ACS statistics are estimated based on a representative survey sample.
How many people live in Iowa?
How many people live in each county in Iowa?
Note: Hover over a county to see its population.
How is Iowa's population distributed by race?
The ACS adheres to definitions of race and ethnicity set forth by the 1997 Office of Management and Budget (OMB) standards. These categories are based on self-identification and are "not an attempt to define race biologically, anthropologically, or genetically," according to the Census Bureau.
According to the OMB standards, the category of "Hispanic" maps to the concept of ethnicity, not race, and so is not included in this chart. A person who identifies as Hispanic may be of any race or combination of races.
The chart below shows how each racial group's population has changed over time in Iowa.
How does the population in Iowa differ by age and sex?
Biologically, humans are slightly more likely to give birth to boys than girls—all other factors being equal, the natural ratio is about 105 boys for every 100 girls. This slight imbalance is apparent in the U.S. population data. At the other end of lifespans, women in the United States are more likely to live longer than men.
About the Data
Data is from the U.S. Census Bureau's American Community Survey (ACS), 1-year estimates. The following tables are used:
• Total Population trend and map: Table B01003
• Race, Age and Sex: Table B01001 and DP05
This report uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.