Marion County Population 2018

Marion County's estimated population is 37,902 with a growth rate of -0.43% in the past year according to the most recent United States census data. Marion County is the 37th largest county in Illinois.

Year Population Growth Growth Rate
201737,902-164-0.43%
201638,066-275-0.72%
201538,341-204-0.53%
201438,545-126-0.33%
201338,671-335-0.86%
201239,006-132-0.34%
201139,138-282-0.72%
201039,420-2,141-5.15%
199041,561-1,962-4.51%
198043,5234,53711.64%
197038,986-363-0.92%
196039,349-2,351-5.64%
195041,700-6,289-13.11%
194047,98912,35434.67%
193035,635-1,862-4.97%
192037,4972,4036.85%
191035,0944,64815.27%
190030,4466,10525.08%
189024,3416552.77%
188023,6863,06414.86%
187020,6227,88361.88%
186012,7396,01989.57%
18506,7201,97841.71%
18404,7422,617123.15%
18302,1250.00%

Marion County Population Growth

Population Data via

Marion County Race Data

Race Population Percentage
White35,72994.27%
Black or African American1,5564.11%
Two or More Races6921.83%
Asian2490.66%
American Indian and Alaska Native1420.37%
Native Hawaiian and Other Pacific Islander100.03%

Marion County Population Pyramid

0k1k1k2k Male Population0k1k1k2k 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