Jefferson County Population 2018

Jefferson County's estimated population is 28,446 with a growth rate of 2.30% in the past year according to the most recent United States census data. Jefferson County is the 12th largest county in Idaho.

Year Population Growth Growth Rate
201728,4466392.30%
201627,8077122.63%
201527,0951740.65%
201426,9211380.52%
201326,7831520.57%
201226,6313241.23%
201126,307870.33%
201026,2209,67758.50%
199016,5431,2398.10%
198015,3043,68531.72%
197011,619-53-0.45%
196011,6721,17711.21%
195010,495-267-2.48%
194010,7621,59117.35%
19309,171-270-2.86%
19209,4410.00%

Jefferson County Population Growth

Population Data via

Jefferson County Race Data

Race Population Percentage
White26,07791.67%
Two or More Races4151.46%
American Indian and Alaska Native3851.35%
Asian1300.46%
Black or African American1050.37%
Native Hawaiian and Other Pacific Islander410.14%

Jefferson 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