McClain County Population 2018

McClain County's estimated population is 39,343 with a growth rate of 1.93% in the past year according to the most recent United States census data. McClain County is the 27th largest county in Oklahoma.

Year Population Growth Growth Rate
201739,3437441.93%
201638,5996361.68%
201537,9637241.94%
201437,2397872.16%
201336,4528722.45%
201235,5803911.11%
201135,1894531.30%
201034,73611,94152.38%
199022,7952,50412.34%
198020,2916,13443.33%
197014,1571,41711.12%
196012,740-1,941-13.22%
195014,681-4,524-23.56%
194019,205-2,370-10.98%
193021,5752,24911.64%
192019,3263,66723.42%
191015,6592,77121.50%
190012,8880.00%

McClain County Population Growth

Population Data via

McClain County Race Data

Race Population Percentage
White32,83983.47%
American Indian and Alaska Native2,5896.58%
Two or More Races2,0585.23%
Black or African American3140.80%
Asian1790.45%
Native Hawaiian and Other Pacific Islander440.11%

McClain 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