Polk, Iowa Natural Population Increase Vs Net Migration

According to recent data from the US Census Bureau, in 2020, the natural population increase for Polk, Iowa (2,558) was 290.5% higher than the net migration for Polk, Iowa (655). You can see the natural population increase vs the net migration for other counties in Iowa here.

The chart and table below shows the natural population increase, the net migration, the net domestic migration, and the net international migration for Polk, Iowa from 2011 to 2020.

Natural Population Increase refers to the number of births minus the number of deaths in a year.

Net Migration for a county refers to the difference between the number of migrants, both domestic and international, moving to the county and those leaving the county in a year.