Jefferson County, Idaho Population 2018

Jefferson County, Idaho's estimated population is 28,446 with a growth rate of 4.98% 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
201728,4461,3504.98%
201627,096-711-2.56%
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
White24,844
Some Other Race1,312
Two or More Races710
American Indian and Alaska Native120
Native Hawaiian and Other Pacific Islander51
Asian41
Black or African American18

Race Data via US Census (2016 ACS 5-Year Survey)

Jefferson County, Idaho Population Pyramid 2018

0%2%4%6%8%10% Male Population0%2%4%6%8%10% Female Population80757065605550454035302520151050

Data via US Census (2016 ACS 5-Year Survey): Table S0101

Jefferson County, Idaho Median Age

31.4


Total

31


Male

31.8


Female

Jefferson County, Idaho Adults

There are 17,639 adults, (2,845 of which are seniors) in Jefferson County, Idaho.

Jefferson County, Idaho Age Dependency

83.3

Age Dependency Ratio

19.2

Old Age Dependency Ratio

64

Child Dependency Ratio

Jefferson County, Idaho Sex Ratio

Female

13,355

49.29%

Male

13,741

50.71%

Jefferson County, Idaho Households and Families

Jefferson County, Idaho Renter vs Owner Occupied by Household Type

Jefferson County, Idaho Household Types

Type Owner Renter
Married87.7%12.3%
All81.4%18.6%
Non Family77.1%22.9%
Male64%36%
Female50.9%49.1%

81.4%

Rate of Home Ownership

Jefferson County, Idaho Households by Type

Type Count Average Size Owned
All8,1503.3281.4
Married5,4193.8487.7
Non Family1,5831.2477.1
Male5943.8664
Female5543.6550.9

3.7

Average Family Size

3.32

Average Household Size

4.7%

Unmarried (Opposite Sex)

0.1%

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 Grade8435.46%
9th to 12th Grade1,0977.10%
High School Graduate4,55529.49%
Some College3,37221.83%
Associates Degree2,36915.34%
Bachelors Degree2,46015.93%
Graduate Degree7504.86%

Jefferson County, Idaho Educational Attainment by Race

Name Total High School Bachelors
White13,93912,9423,145
Hispanic1,26434721
Other Race620107
Multiple Races10710323
Native American9973
Islander4242
Asian414141
Black66

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 100.00%.

Jefferson County, Idaho Earnings by Educational Attainment

Name Average Male Female
Overall$31,717$41,753$20,546
Less Than High School$23,185$34,457$12,010
High School Grad$25,807$41,203$13,552
Some College$31,905$41,353$26,968
Bachelors Degree$40,349$53,389$23,304
Graduate Degree$58,050$81,339$55,026

$31,717

Average Earnings

$41,753

Average Male

$20,546

Average Female

Jefferson County, Idaho Language

Jefferson County, Idaho Language by Age

Jefferson County, Idaho Language

90.65% of Jefferson County, Idaho residents speak only English, while 9.35% speak other languages. The largest non-English language is Spanish, which is spoken by 8.19% of the population.

Jefferson County, Idaho Poverty

Jefferson County, Idaho Poverty by Race

Name Total In Poverty Poverty Rate
White23,5522,2979.75%
Hispanic2,79861922.12%
Other1,30426920.63%
Multiple71020028.17%
Asian413482.93%
Native1162824.14%

11.19%

Overall Poverty Rate

8.92%

Male Poverty Rate

13.53%

Female Poverty Rate

Poverty in Jefferson County, Idaho

The race most likely to be in poverty in Jefferson County, Idaho is Asian, with 82.93% below the poverty level.

The race least likely to be in poverty in Jefferson County, Idaho is White, with 9.75% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 4.66%. Among those working part-time, it was 10.89%, and for those that did not work, the poverty rate was 15.20%.

Jefferson County, Idaho Poverty Rate by Education

Name Poverty
Less Than High School18.35%
High School10.69%
Some College8.13%
Bachelors or Greater4.77%

Jefferson County, Idaho Poverty Rate by Employment Status and Sex

Name Poverty
Female Unemployed28.10%
Male Unemployed10.33%
Female Employed9.63%
Male Employed5.31%

Jefferson County, Idaho Income

Jefferson County, Idaho Income by Household Type

Name Median Mean
Households$54,646$67,284
Families$58,195$71,592
Married Families$62,889$
Non Families$32,981$42,518

Jefferson County, Idaho Marital Status

Jefferson County, Idaho Marital Status

Marriage Rates

60.2%

Overall Marriage Rate

59.1%

Male Marriage Rate

61.4%

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 45To54, while the female age group most likely to be married is 45To54.

Jefferson County, Idaho Marital Status by Race

Jefferson County, Idaho Veterans

Jefferson County, Idaho Veterans by War

1,405

Number of Veterans

1,349

Male Veterans

56

Female Veterans

Name Veterans
Vietnam466
Second Gulf War335
First Gulf War313
Korea95
World War II47

Jefferson County, Idaho Veterans by Age

Name Veterans
65 to 74482
35 to 54374
55 to 64204
75+195
18 to 34150

Jefferson County, Idaho Veterans by Race

Name Veterans % of Total
White1,3378.15%
Hispanic855.33%
Other607.10%
Hawaiian59.80%
Indian33.03%

Jefferson County, Idaho Veterans by Education

5.48%

Veteran Poverty Rate

27.62%

Veteran Disability Rate

Jefferson County, Idaho Employment Status

Jefferson County, Idaho Employment by Age

64.6%

Labor Force Participation

61.5%

Employment Rate

4.8%

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