Fastest Growing Cities In Idaho For 2020

We used data and science to determine the places in Idaho everyone wants to move to today.

Editor’s Note: Data has been updated for 2020. This is our sixth time ranking the fastest growing cities in Idaho.

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Is being in an area that's growing quickly a good thing or a bad thing?

Depends on who you ask. Some want bigger, more exciting cities like Boise City and Meridian, while others want peace and quiet like in Fruitland and Preston, thank you very much.

But today we're going to put opinions aside and just look at the cold hard facts -- over the past five years, which cities in Idaho have the grown the fastest.

After getting knee deep in the Census's American Community Survey, we emerged with this set of cities in the Gem State that have people climbing over each other to get in.

These are the 10 fastest growing cities in Idaho for 2020 according to the most recent census data:

The 10 Fastest Growing Cities In Idaho For 2020

  1. Star
  2. Meridian (Photos)
  3. Middleton (Photos)
  4. Kuna (Photos)
  5. Eagle (Photos)
  6. Ammon (Photos)
  7. Post Falls (Photos)
  8. Caldwell (Photos)
  9. Rathdrum (Photos)
  10. Nampa (Photos)

What's the fastest growing city in Idaho for 2020? Based on the most recent ACS data, Star ranks as the fastest growing city in Idaho. If you happen to be a resident of Star, you're probably not too surprised to find it on our list.

If you're surprised--and you're wondering why these places are kind of a big deal--keep reading. We'll tell you what makes each of these 10 places in Idaho are growing like weeds.

And if you already knew these places were happening, check out the best places to live in Idaho or the Fastest Growing States In America.

For more Idaho state reading:

The 10 Fastest Growing Cities In Idaho For 2020

Overall SnackAbility


Population: 8,495
Rank Last Year: 1 (No Change)
Population 2010: 5,173
Percent Growth 64.2%
Absolute Growth: 3,322
More on Star: Homes For Sale | Data

Meridian, ID

Source: Public domain
Overall SnackAbility


Population: 97,008
Rank Last Year: 2 (No Change)
Population 2010: 68,953
Percent Growth 40.7%
Absolute Growth: 28,055
More on Meridian: Homes For Sale | Data | Photos

Meridian is a city located in Ada County in the US state of Idaho. As of the 2010 census, the population of Meridian was 75,092 making it the third largest city in Idaho after Boise and Nampa. A 2015 estimate placed the population at approximately 90,739. Meridian is the state's fastest-growing city, with an 81.5 percent increase in population since 2000.

Middleton, ID

Overall SnackAbility


Population: 7,115
Rank Last Year: 3 (No Change)
Population 2010: 5,203
Percent Growth 36.7%
Absolute Growth: 1,912
More on Middleton: Homes For Sale | Data | Photos

Middleton is a city in Canyon County, Idaho, United States. The population was 5,524 at the 2010 census, up from 2,978 in 2000. It is part of the Boise City-Nampa, Idaho Metropolitan Statistical Area.

Kuna, ID

Overall SnackAbility


Population: 18,445
Rank Last Year: 4 (No Change)
Population 2010: 13,764
Percent Growth 34.0%
Absolute Growth: 4,681
More on Kuna: Homes For Sale | Data | Photos

Kuna is a city in Ada County, Idaho, United States. It is part of the Boise City-Nampa, Idaho Metropolitan Statistical Area. The population was 15,210 at the 2010 census.

Eagle, ID

Overall SnackAbility


Population: 25,075
Rank Last Year: 5 (No Change)
Population 2010: 18,752
Percent Growth 33.7%
Absolute Growth: 6,323
More on Eagle: Homes For Sale | Data | Photos

Ammon, ID

Overall SnackAbility


Population: 15,403
Rank Last Year: 6 (No Change)
Population 2010: 12,443
Percent Growth 23.8%
Absolute Growth: 2,960
More on Ammon: Homes For Sale | Data | Photos

Ammon is an edge city of Idaho Falls in Bonneville County, Idaho, United States. As of the 2010 US Census, the population of Ammon was 13,816.

Post Falls, ID

Overall SnackAbility


Population: 31,945
Rank Last Year: 8 (Up 1)
Population 2010: 26,179
Percent Growth 22.0%
Absolute Growth: 5,766
More on Post Falls: Homes For Sale | Data | Photos

Post Falls is a city in Kootenai County, Idaho, between Coeur d'Alene and Spokane, Washington. It is both a suburb of Coeur d'Alene, to the east; and a bedroom community to Spokane, to the west. The population was 27,574 at the 2010 census, up from 17,247 in 2000 census, making it Idaho's tenth largest city. The U.S. Census Bureau estimated 2014 population is 30,123.

Caldwell, ID

Source: Public domain
Overall SnackAbility


Population: 53,205
Rank Last Year: 7 (Down 1)
Population 2010: 43,749
Percent Growth 21.6%
Absolute Growth: 9,456
More on Caldwell: Homes For Sale | Data | Photos

Caldwell is a city in and the county seat of Canyon County, Idaho, United States. The population was 46,237 at the 2010 census.

Rathdrum, ID

Overall SnackAbility


Population: 7,904
Rank Last Year: 9 (No Change)
Population 2010: 6,545
Percent Growth 20.8%
Absolute Growth: 1,359
More on Rathdrum: Homes For Sale | Data | Photos

Rathdrum is a city in Kootenai County, Idaho, United States. The population was 6,826 at the 2010 census, up from 4816 in 2000. It is part of the Coeur d'Alene Metropolitan Statistical Area, which includes the entire county. It is named after Rathdrum in Ireland.

Nampa, ID

Source: Public domain
Overall SnackAbility


Population: 91,663
Rank Last Year: 10 (No Change)
Population 2010: 78,322
Percent Growth 17.0%
Absolute Growth: 13,341
More on Nampa: Homes For Sale | Data | Photos

Nampa ) is the largest city of Canyon County, Idaho. The population of Nampa was 81,557 at the 2010 census making it the second-most populous city in Idaho. Nampa is located about 20 miles west of Boise along Interstate 84, and six miles west of Meridian. Nampa is the second principal city of the Boise-Nampa metropolitan area. The name "Nampa" may have come from a Shoshoni word meaning either moccasin or footprint.

How We Measured The Fastest Growing Cities In the Gem State for 2020

To figure out which cities are growing the most, we simply had to look at the growth rates for cities sine the beginning of the decade, according to the American Community Survey put out by the census every year. Specifically:

  • Current Population
  • Population in 2010
  • Growth rate from 2010 to Current (The latest available data which came out in Dec 2018)

We ranked all 33 Idaho cities with a population over 5,000 people from highest growth rate to lowest.

The city with the highest growth rate during this time was crowned the fastest growing city in the Gem State.

And for those of you who are a little rusty with their statistics, you can calculate the growth rate by the following formula:

[Current Population - Population 2010] / [Population 2010]

Here's a graph of the cities in Idaho with the largest percent increase in population:
Fastest Growing Cities in Idaho Graph For 2020

Click to enlarge

These Places Grew Up So Fast In Idaho, You Know?

So there you have it, the fastest growing cities in Idaho are led by Star which has been growing at a blistering pace this decade relative to other cities and towns around the state.

It'll be interesting to see if these places can keep growing at the same rate over the next couple of years. We'll be here to let you know!

These places have been growing (or shrinking) the slowest (fastest):

  1. Weiser
  2. Payette
  3. Emmett

For more Idaho reading, check out:

Detailed List Of Fastest Growing Places In Idaho For 2020

Rank City Growth Population Population 2010
1 Star 64.2% 8,495 5,173
2 Meridian 40.7% 97,008 68,953
3 Middleton 36.7% 7,115 5,203
4 Kuna 34.0% 18,445 13,764
5 Eagle 33.7% 25,075 18,752
6 Ammon 23.8% 15,403 12,443
7 Post Falls 22.0% 31,945 26,179
8 Caldwell 21.6% 53,205 43,749
9 Rathdrum 20.8% 7,904 6,545
10 Nampa 17.0% 91,663 78,322

How Is The Area In ?

About Chris Kolmar

Chris Kolmar has been in the real estate business for almost ten years now. He originally worked for Movoto Real Estate as the director of marketing before founding HomeSnacks.

He believes the key to finding the right place to live comes down to looking at the data, reading about things to do, and, most importantly, checking it out yourself before you move.

If you've been looking for a place to live in the past several years, you've probably stumbled upon his writing already.

You can find out more about him on LinkedIn or his website.