Idaho Population 2018

1,753,860

Our 2018 estimate for Idaho's population is 1.75 million, based on the most recent Census estimates and its current growth rate of 0.89% per year.

Situated toward the northwestern edge of the United States, Idaho is one of the larger states in the country, and its population growth statistics are impressive as well. The last set of confirmed figures comes from the official Census of 2010 which declared that there were 1,567,582 people living in the state -- a rise of just over 20% on the numbers declared in 2000.

An updated estimate on those figures was released in 2011, and it was suggested that the population of Idaho had increased to 1,584,985, making it the 39th largest state in the US. As of the 2015 estimates, the population had increased to 1,654,930.

Idaho Population Density

At a total surface area of 83,570 square miles, Idaho is the 14th biggest state in the country, and even without looking at population density figures, it’s already clear from a population of just over 1.6 million that Idaho must be a very sparsely populated state.

In fact, there are just 19 people for every square mile of land, and only six states in the US can claim a more sparsely populated landscape.

There are a number of reasons for this, mainly because parts of Idaho are inhospitable for permanent settlement. The Rocky Mountains dominate much of Idaho’s skyline and the state is also home to sprawling lakes.

Idaho Population History

Idaho was part of Oregon Territory, definitively acquired in 1846, and was included in Washington Territory upon its establishment in 1853. Idaho became a separate territory in 1863, acquired essentially its present boundaries in 1868, and was admitted as a State on July 3, 1890. Census coverage of present-day Idaho virtually began in 1870, when nearly its whole area was included.

Idaho Population Chart

Idaho’s Population History

Idaho is a relatively new addition to the list of US states, and the creation of the Idaho territory took place in 1863. The first recorded Idaho population came from the US Census of 1870 when it was shown that there were just 14,999 residents.

Ten years later in 1880, those numbers had more than doubled to 32,610, and similar increases were recorded throughout the remainder of the 19th century. Idaho joined the Union in 1890, and by the time of the 1900 Census, 161,772 citizens were residing in the new state.

Those huge increases started to slow down, but continued, steady growth throughout the 20th century has taken the Idaho population of 2016 over the 1.6 million mark.

Impressive natural growth

In 2005 it was claimed that Idaho was the 6th fastest growing state in the US after natural growth figures were released. In the five years following the Census of 2000, that natural growth had led to a net increase of 58,884 citizens due to 111,131 births minus 52,247 deaths and a further increase in net migration added more than 75,000 new residents.

In 2016 Idaho is still growing at an impressive 1.22% per year, putting it 11th among the 50 states in growth rate, and drawing it closer to the 38th spot in overall population, currently held by West Virginia.

Can that growth be sustained? Idaho may have the space, but geography and a harsh landscape may suggest otherwise. Estimated figures for the 2020 population are expected to surpass 1.75 million people.

Population Data via US Census

Idaho Growth Rate

Idaho Population Rank

Year Pop % Change
20201,827,6942.06%
20191,790,7772.10%
20181,753,8602.15%
20171,716,9432.20%
20161,680,026Infinity%
20161,635,483-0.84%
20151,649,3241.16%
20141,630,3911.25%
20131,610,1870.97%
20121,594,6730.73%
20111,583,1800.78%
20101,570,9121.96%
20001,293,9532.54%
19901,006,7490.65%
1980943,9352.85%
1970712,5670.66%
1960667,1911.26%
1950588,6371.15%
1940524,8731.66%
1930445,0320.30%
1920431,8662.86%
1910325,5947.25%
1900161,7726.21%
189088,54810.51%
188032,6108.08%
187014,9990.00%

Idaho Facts

Idaho Population in 2018Source: By Photo by Merrill Humberg, Taken 11/25/2006.Wikipedia uploader was Twunchy at en.wikipedia [GFDL (http://www.gnu.org/copyleft/fdl.html), CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0/) or CC BY 2.5 (https://creativecommons.org/licenses/by/2.5)], via Wikimedia Commons

  • Idaho is known as the Gem State because 72 types of precious and semi-precious stones are produced in the state.
  • Idaho's 3,100 miles of rivers is the most in the United States.
  • Boise State has the world's only blue football field, nicknamed The Smurf Turf.
  • Hell's Canyon is the deepest gorge in the country. At 7,900 feet, it is deeper than the Grand Canyon.
  • Five historic pioneer trails cross over Idaho.
  • The largest man-made geyser is located in Soda Springs.
  • Elk Mountain Farms, which grows hops for Anheuser-Busch, stretches across 1,800 acres and is the largest hops farm in the world.
  • The Kamiah Valley was the setting for legends and history of the Nez Perce tribe.
  • Idaho City's economy was originally developed around gold mining.

Idaho Population Density by County

Ada County

  • Population456,849
  • Density434.01 per sq km
  • Growth Since 201016.11%
  • State Rank1
  • % of State26.61%

Idaho Population Growth Rate by County

The population of counties in Idaho are balanced pretty evenly, with some counties reflecting growth in population and others posting decreasing numbers. The 2010 Census numbers were compared to estimates taken by the US Census Bureau in 2015 to get the positive and netgative growth rates of all Idaho counties. These numbers show that the southwestern county of Ada had the highest growth rate, recorded as 10.36%. Neighboring county Canyon saw a growth increase of 9.54%, while Kootenai along the western border also posted a high increase of 8.23%. Other counties, including Blaine, Lincoln, and Jerome posted smaller increases in population.

As far as decreasing population, a few Idaho counties posted significant drops, with Butte County recording the highest decline of over 14%. Its neighbors Clark County and Custer County also had decreases of 10.11% and 6.26%, respectively. Other counties including Fremont, Power, and Elmore are among the other areas that had declining populations during this 5-year period.

Population by Race

Race Population
White1,493,155
Some Other Race44,758
Two or More Races42,050
Asian21,630
American Indian and Alaska Native21,454
Black or African American10,433
Native Hawaiian and Other Pacific Islander2,003

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

Idaho Population Pyramid 2018

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

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

Idaho Median Age

35.7


Total

34.9


Male

36.6


Female

Idaho Adults

There are 1,203,715 adults, (233,874 of which are seniors) in Idaho.

Idaho Age Dependency

68.5

Age Dependency Ratio

24

Old Age Dependency Ratio

44.4

Child Dependency Ratio

Idaho Sex Ratio

Female

815,638

49.87%

Male

819,845

50.13%

Idaho Households and Families

Idaho Renter vs Owner Occupied by Household Type

Idaho Household Types

Type Owner Renter
Married80.8%19.2%
All68.9%31.1%
Non Family55.9%44.1%
Male55%45%
Female49.6%50.4%

68.9%

Rate of Home Ownership

Idaho Households by Type

Type Count Average Size Owned
All596,1072.6968.9
Married325,9183.380.8
Non Family187,8261.355.9
Female56,0193.4449.6
Male26,3443.5355

3.24

Average Family Size

2.69

Average Household Size

5.2%

Unmarried (Opposite Sex)

0.3%

Unmarried (Same Sex)

Idaho Households

Idaho Education

Idaho Educational Attainment by Sex (over 25)

Education Attained Count Percentage
Less Than 9th Grade39,7503.79%
9th to 12th Grade65,4206.24%
High School Graduate289,08527.59%
Some College280,53426.78%
Associates Degree97,8339.34%
Bachelors Degree187,39917.89%
Graduate Degree87,5858.36%

Idaho Educational Attainment by Race

Name Total High School Bachelors
White908,524846,261254,217
Hispanic93,68756,5888,473
Other Race22,87612,2251,630
Multiple Races16,56314,1663,450
Asian14,56012,6576,104
Native American12,96010,8031,580
Black5,1464,5221,373
Islander1,018920191

The highest rate of high school graduation is among white people with a rate of 93.15%.

The highest rate of bachelors degrees is among white people with a rate of 41.92%.

Idaho Earnings by Educational Attainment

Name Average Male Female
Overall$31,160$37,796$24,024
Less Than High School$21,726$27,145$14,245
High School Grad$25,792$31,710$18,961
Some College$29,729$36,754$23,018
Bachelors Degree$41,251$52,076$32,752
Graduate Degree$58,846$71,790$48,514

$31,160

Average Earnings

$37,796

Average Male

$24,024

Average Female

Idaho Language

Idaho Language by Age

Idaho Language

89.38% of Idaho residents speak only English, while 10.62% speak other languages. The largest non-English language is Spanish, which is spoken by 7.94% of the population.

Idaho Poverty

Idaho Poverty by Race

Name Total In Poverty Poverty Rate
White1,332,412178,12913.37%
Hispanic190,93847,49724.88%
Other44,48311,85726.66%
Multiple40,9629,80923.95%
Native20,4616,00329.34%
Asian21,1003,34215.84%
Black9,8332,79828.46%
Islander1,89549426.07%

15.24%

Overall Poverty Rate

14.26%

Male Poverty Rate

16.23%

Female Poverty Rate

Poverty in Idaho

The race most likely to be in poverty in Idaho is Native, with 29.34% below the poverty level.

The race least likely to be in poverty in Idaho is White, with 13.37% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 3.74%. Among those working part-time, it was 20.56%, and for those that did not work, the poverty rate was 20.90%.

Idaho Poverty Rate by Education

Name Poverty
Less Than High School23.40%
High School14.32%
Some College11.02%
Bachelors or Greater5.30%

Idaho Poverty Rate by Employment Status and Sex

Name Poverty
Female Unemployed34.13%
Male Unemployed31.51%
Female Employed10.29%
Male Employed8.01%

Idaho Income

Idaho Income by Household Type

Name Median Mean
Households$49,174$64,513
Families$59,652$75,141
Married Families$66,700$83,198
Non Families$27,918$38,465

Idaho Marital Status

Idaho Marital Status

Marriage Rates

54.7%

Overall Marriage Rate

55.4%

Male Marriage Rate

54.0%

Female Marriage Rate

Idaho Married by Age and Sex

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.

Idaho Marital Status by Race

Idaho Veterans

Idaho Veterans by War

118,313

Number of Veterans

110,061

Male Veterans

8,252

Female Veterans

Name Veterans
Vietnam46,301
First Gulf War22,802
Second Gulf War17,237
Korea11,087
World War II6,361

Idaho Veterans by Age

Name Veterans
65 to 7431,690
35 to 5427,986
75+24,978
55 to 6424,387
18 to 349,272

Idaho Veterans by Race

Name Veterans % of Total
White112,71010.16%
Hispanic3,8853.28%
2 or More1,8038.39%
Indian1,3148.54%
Black98714.86%
Asian7864.65%
Other6802.32%
Hawaiian332.24%

Idaho Veterans by Education

8.12%

Veteran Poverty Rate

31.15%

Veteran Disability Rate

Idaho Employment Status

Idaho Employment by Age

62.6%

Labor Force Participation

58.4%

Employment Rate

6.2%

Unemployment Rate

Idaho Employment by Race

Idaho Employment by Education

Idaho Nativity

Idaho Citizenship Status

Data Sources
  1. Idaho Department of Labor
  2. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  3. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  4. American Community Survey (2009 - 2013)
  5. Census QuickFacts
  6. Historical Populations of States and Counties (1790 - 1990)