Mercer County Population 2018

Mercer County's estimated population is 15,618 with a growth rate of -0.08% in the past year according to the most recent United States census data. Mercer County is the 72nd largest county in Illinois.

Year Population Growth Growth Rate
201715,618-12-0.08%
201615,630-117-0.74%
201515,747-155-0.97%
201415,902-173-1.08%
201316,075-88-0.54%
201216,163-152-0.93%
201116,315-95-0.58%
201016,410-880-5.09%
199017,290-1,996-10.35%
198019,2861,99211.52%
197017,2941450.85%
196017,149-225-1.30%
195017,374-327-1.85%
194017,7011,0606.37%
193016,641-2,159-11.48%
192018,800-923-4.68%
191019,723-1,222-5.83%
190020,9452,40012.94%
189018,545-957-4.91%
188019,5027333.91%
187018,7693,72724.78%
186015,0429,796186.73%
18505,2462,894123.04%
18402,3522,3268946.15%
1830260.00%

Mercer County Population Growth

Population Data via

Mercer County Race Data

Race Population Percentage
White15,50399.26%
Two or More Races1460.93%
Black or African American1030.66%
Asian620.40%
American Indian and Alaska Native220.14%
Native Hawaiian and Other Pacific Islander30.02%

Mercer County Population Pyramid

0k0k0k0k0k1k1k Male Population0k0k0k0k0k1k1k 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