Jefferson County Population 2017

Jefferson County's estimated population is 27,839 with a growth rate of 2.53% 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
201627,8396862.53%
201527,1531650.61%
201426,9881460.54%
201326,8421840.69%
201226,6583231.23%
201126,3351140.43%
201026,2219,67858.50%
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
White26,07793.67%
Two or More Races4151.49%
American Indian and Alaska Native3851.38%
Asian1300.47%
Black or African American1050.38%
Native Hawaiian and Other Pacific Islander410.15%

Jefferson County Population Pyramid

0k1k1k2kJefferson County Male Population0k1k1k2kJefferson County Female Population

Population of Cities in Jefferson County

City 2010 Census 2016 Estimated Growth Growth Rate
Rigby396140621012.55%
Menan747781344.55%
Ririe64164320.31%
Roberts582579-3-0.52%
Lewisville447481347.61%
Hamer899122.25%
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