Marion County Population 2018

Marion County's estimated population is 33,105 with a growth rate of -0.13% in the past year according to the most recent United States census data. Marion County is the 22nd largest county in Iowa.

Year Population Growth Growth Rate
201733,105-44-0.13%
201633,149400.12%
201533,109-151-0.45%
201433,2602500.76%
201333,010-256-0.77%
201233,26640.01%
201133,262370.11%
201033,2253,22410.75%
199030,0013321.12%
198029,6693,31712.59%
197026,3524661.80%
196025,886-44-0.17%
195025,930-1,089-4.03%
194027,0191,2925.02%
193025,7277703.09%
192024,9571,9628.53%
191022,995-1,164-4.82%
190024,1591,1014.77%
189023,058-2,053-8.18%
188025,1116752.76%
187024,4367,62345.34%
186016,81311,331206.69%
18505,4820.00%

Marion County Population Growth

Population Data via

Marion County Race Data

Race Population Percentage
White31,94496.49%
Asian4741.43%
Two or More Races3581.08%
Black or African American2840.86%
American Indian and Alaska Native740.22%
Native Hawaiian and Other Pacific Islander70.02%

Marion County Population Pyramid

0k0k0k1k1k1k1k Male Population0k0k0k1k1k1k1k Female Population8580757065605550454035302520151050
Data Sources
  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990