Jefferson County, Idaho Population 2018

Jefferson County, Idaho's estimated population is 27,410 with a growth rate of -1.43% in the past year according to the most recent United States census data. Jefferson County, Idaho is the 12th largest county in Idaho.

Year Population Growth Growth Rate
201728,4461,0363.78%
201727,410-397-1.43%
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, Idaho Population Growth

Population Data via

Population by Race

Race Population
White24,872
Some Other Race1,462
Two or More Races838
American Indian and Alaska Native87
Asian70
Native Hawaiian and Other Pacific Islander62
Black or African American19

Data via US Census (2017 ACS 5-Year Survey): Table B03002

Jefferson County, Idaho Population Pyramid 2018

5001,0001,500 Male Population5001,0001,500 Female Population80757065605550454035302520151050

Data via US Census (2017 ACS 5-Year Survey): Table S0101

Jefferson County, Idaho Median Age

31.3


Total

30.9


Male

31.7


Female

Jefferson County, Idaho Adults

There are 17,893 adults, (2,921 of whom are seniors) in Jefferson County, Idaho.

Jefferson County, Idaho Age Dependency

83.1

Age Dependency Ratio

19.5

Old Age Dependency Ratio

63.6

Child Dependency Ratio

Jefferson County, Idaho Sex Ratio

Female

13,499

49.25%

Male

13,911

50.75%

Jefferson County, Idaho Households and Families

Jefferson County, Idaho Renter vs Owner Occupied by Household Type

Data via US Census (2017 ACS 5-Year Survey): Table S1101

Jefferson County, Idaho Household Types

Type Owner Renter
Married86.9%13.1%
All81%19%
Male72.3%27.7%
Non Family69.5%30.5%
Female54.7%45.3%

81.0%

Rate of Home Ownership

Jefferson County, Idaho Households by Type

Type Count Average Size Owned
All8,4703.2381
Married5,8843.7286.9
Non Family1,6541.269.5
Male5023.5972.3
Female4303.9354.7

3.63

Average Family Size

3.23

Average Household Size

4.5%

Unmarried (Opposite Sex)

0%

Unmarried (Same Sex)

Jefferson County, Idaho Households

Jefferson County, Idaho Education

Jefferson County, Idaho Educational Attainment by Sex (over 25)

Education Attained Count Percentage
Less Than 9th Grade8805.61%
9th to 12th Grade1,0326.58%
High School Graduate4,44328.32%
Some College3,57022.76%
Associates Degree2,42915.49%
Bachelors Degree2,39815.29%
Graduate Degree9345.95%

Jefferson County, Idaho Educational Attainment by Race

Name Total High School Bachelors
White14,07513,0843,224
Hispanic1,34343659
Other Race7422142
Multiple Races14514260
Native American7358
Asian707046
Islander5555
Black1313

The highest rate of high school graduation is among black people with a rate of 100.00%.

The highest rate of bachelors degrees is among black people with a rate of 65.71%.

Jefferson County, Idaho Earnings by Educational Attainment

Name Average Male Female
Overall$33,764$42,716$22,224
Less Than High School$24,521$35,403$12,319
High School Grad$28,690$38,333$15,334
Some College$33,300$43,311$26,371
Bachelors Degree$36,830$50,057$24,539
Graduate Degree$59,524$69,732$52,794

$33,764

Average Earnings

$42,716

Average Male

$22,224

Average Female

Jefferson County, Idaho Language

Jefferson County, Idaho Language by Age

Jefferson County, Idaho Language

89.79% of Jefferson County, Idaho residents speak only English, while 10.21% speak other languages. The largest non-English language is Spanish, which is spoken by 8.77% of the population.

Jefferson County, Idaho Poverty

Jefferson County, Idaho Poverty by Race

Name Total In Poverty Poverty Rate
White23,7851,9468.18%
Hispanic2,85054419.09%
Other1,45424817.06%
Multiple83823227.68%
Asian704057.14%
Native831821.69%

9.50%

Overall Poverty Rate

7.83%

Male Poverty Rate

11.22%

Female Poverty Rate

Poverty in Jefferson County, Idaho

The race most likely to be in poverty in Jefferson County, Idaho is Asian, with 57.14% below the poverty level.

The race least likely to be in poverty in Jefferson County, Idaho is White, with 8.18% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 4.18%. Among those working part-time, it was 10.74%, and for those that did not work, the poverty rate was 11.08%.

Jefferson County, Idaho Poverty Rate by Education

Name Poverty
Less Than High School13.49%
High School9.16%
Some College6.12%
Bachelors or Greater4.83%

Jefferson County, Idaho Poverty Rate by Employment Status and Sex

Name Poverty
Female Unemployed12.82%
Female Employed9.12%
Male Unemployed8.44%
Male Employed5.38%

Jefferson County, Idaho Income

Jefferson County, Idaho Income by Household Type

Name Median Mean
Households$58,055$68,899
Families$61,338$73,971
Married Families$64,578$
Non Families$37,432$43,258

Jefferson County, Idaho Marital Status

Jefferson County, Idaho Marital Status

Marriage Rates

63.0%

Overall Marriage Rate

60.6%

Male Marriage Rate

65.4%

Female Marriage Rate

Jefferson County, Idaho Married by Age and Sex

Jefferson County, Idaho Marriage

The age group where males are most likely to be married is Over65, while the female age group most likely to be married is 35To44.

Jefferson County, Idaho Marital Status by Race


Data via US Census (2017 ACS 5-Year Survey): Table S1201

Jefferson County, Idaho Veterans

Jefferson County, Idaho Veterans by War

1,492

Number of Veterans

1,424

Male Veterans

68

Female Veterans

Name Veterans
Vietnam561
Second Gulf War398
First Gulf War315
Korea88
World War II44

Jefferson County, Idaho Veterans by Age

Name Veterans
65 to 74488
35 to 54420
55 to 64198
75+197
18 to 34189

Jefferson County, Idaho Veterans by Race

Name Veterans % of Total
White1,4228.64%
Hispanic764.64%
Other616.37%
Hawaiian69.68%
Indian34.11%

Jefferson County, Idaho Veterans by Education

4.22%

Veteran Poverty Rate

27.35%

Veteran Disability Rate

Jefferson County, Idaho Employment Status

Jefferson County, Idaho Employment by Age

65.7%

Labor Force Participation

62.6%

Employment Rate

4.6%

Unemployment Rate

Jefferson County, Idaho Employment by Race

Jefferson County, Idaho Employment by Education

Population of Cities in Jefferson County, Idaho

City 2010 Census 2016 Estimated Growth Growth Rate
Rigby396140621012.55%
Menan747781344.55%
Ririe 64164320.31%
Roberts582579-3-0.52%
Lewisville447481347.61%
Mud Lake359386277.52%
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