• county
  • FIPS 30027
  • Largest town: Lewistown

Fergus County, Montana

Fergus County had 11,862 residents in the Census Vintage 2024 estimate, on 4,339.3 square miles of land. It ranks 18th of 56 in Montana by population and 8th by land area.

Population
11,862
#18 of 56 in Montana · #2,290 in US
Area
4,339.3 sq mi
#8 of 56 in Montana · #106 in US
Density
2.7 / sq mi
#29 of 56 in Montana · #2,927 in US
Median household income
$63,717
#19 of 56 in Montana · #1,484 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

Fergus County within Montana. Pin: Helena.

Measure from here

Tools and pages that start from Fergus County

Fergus County population, land area and income

Fergus County had 11,862 residents in the Census Vintage 2024 estimate, on 4,339.3 square miles of land. It ranks 18th of 56 in Montana by population and 8th by land area. That works out to 2.7 people per square mile, below the US average of 96.3, and in the bottom quarter nationally.

The median county-equivalent in Montana has 7,814 residents; Fergus County is somewhat larger.

Its SAIPE 2023 median household income of $63,717 is above the national county median among 3,143 counties with an estimate.

National rank among 3,144

Population

11,862

3144th1st

2290th of 3,144 (US)

Land area

4,339 sq mi

3144th1st

106th of 3,144 (US)

Density

2.7 / sq mi

3144th1st

2927th of 3,144 (US)

Median household income

$63,717

3143rd1st

1484th of 3,143 (US)

Rank within Montana (56)

Population

11,862

56th1st

18th of 56 (MT)

Land area

4,339 sq mi

56th1st

8th of 56 (MT)

Density

2.7 / sq mi

56th1st

29th of 56 (MT)

Median household income

$63,717

56th1st

19th of 56 (MT)

How Fergus County's population changed since 2020

Fergus County gained 392 residents between the July 2020 and July 2024 estimates, a rise of 3.4%. That ranks 27th of 56 in Montana for growth. The median Montana county changed by +2.8%, and the state as a whole by +4.6%.

Since the April 2020 estimates base, Fergus County recorded 516 births and 672 deaths, a natural change of -156. Net international migration added +43 and net domestic migration, people moving to or from other US counties, came to +540. The largest single component was domestic migration, which added 540 people.

11.5k202011.6k202111.7k202211.8k202311.9k2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
516
Deaths
672
Net international migration
+43
Net domestic migration
+540
Change, July 2023 to July 2024
+46

Where Fergus County is

The Census internal point of Fergus County is at 47.221800, -109.233000. It sits in UTM zone 12N. The map shades Montana's 56 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Fergus County outlined. Dots are towns of 1,000+ people with residents in it.

Liberty County: -1.2%Golden Valley County: +5.1%Dawson County: -2.1%Flathead County: +9.2%Beaverhead County: +6.7%Prairie County: +2.0%Garfield County: +0.9%Lewis and Clark County: +5.5%Sweet Grass County: +2.4%Wheatland County: -0.7%Ravalli County: +8.5%Jefferson County: +9.6%Carter County: -0.6%Chouteau County: -0.6%Custer County: +0.9%Teton County: +3.1%Granite County: +9.0%Deer Lodge County: +4.1%Cascade County: +0.1%Powder River County: +2.4%Meagher County: +7.3%Daniels County: -1.7%Glacier County: -1.8%Wibaux County: -2.7%Fallon County: -2.7%McCone County: -0.7%Sheridan County: -2.5%Missoula County: +3.5%Toole County: +3.7%Sanders County: +11.5%Roosevelt County: -5.6%Rosebud County: -1.3%Treasure County: -2.5%Yellowstone County: +3.9%Blaine County: -1.4%Musselshell County: +14.8%Broadwater County: +21.0%Powell County: +2.6%Fergus County: +3.4%Phillips County: +0.1%Gallatin County: +6.2%Silver Bow County: +2.6%Madison County: +12.6%Richland County: -4.4%Lake County: +6.9%Valley County: -1.7%Judith Basin County: +4.3%Hill County: -1.2%Big Horn County: -2.2%Stillwater County: +5.0%Carbon County: +9.4%Mineral County: +13.7%Petroleum County: +4.6%Pondera County: +3.4%Park County: +4.9%Lincoln County: +12.4%
Change 2020 to 2024
  1. < -1.4%
  2. < +0.9%
  3. < +3.9%
  4. < +7.3%
  5. ≥ +7.3%
no data

Orange pin: Fergus County internal point. Dark pin: Helena.

Internal point

Decimal
47.221800, -109.233000
DMS
47°13'18.48"N 109°13'58.80"W
UTM
12N 633778.6E 5231326.8N
Geohash
c86kdk6yy
Plus code
85VG6QC8+PR

Towns in Fergus County

One incorporated place of 1,000+ people has residents in Fergus County, 6,204 people together, or 52% of the county. Each figure counts only the part of the town inside Fergus County; towns marked "part" extend into another county. The largest is Lewistown with 6,204.

  1. 01Lewistown6,204
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Fergus County

The Census 2024 county adjacency file lists 8 neighbors for Fergus County. The most populous is Blaine County, MT, with 6,903 residents. Distances run between Census internal points in a straight line.

Distance to Helena and the nearest big city

Helena is 138.6 miles WSW of Fergus County's internal point in a straight line. The nearest place of 100,000 or more is Billings, MT (population 121,483), 104.2 miles away. The nearest place of 10,000 or more is Great Falls, MT (population 60,013), 98.7 miles away.

Fergus County FIPS code

The FIPS code of Fergus County is 30027: state code 30 for Montana plus county code 027. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $63,717.

Questions people ask

What is the population of Fergus County, Montana?

The Census Vintage 2024 estimate for July 1, 2024 is 11,862. That is up 392 people (3.4%) from the July 2020 estimate of 11,470.

What is the FIPS code of Fergus County?

30027. The first two digits (30) are Montana; the last three (027) identify the county.

What is the largest town in Fergus County?

Lewistown, with 6,204 residents inside Fergus County in 2024.

Which counties border Fergus County?

8 county-equivalents border it in the Census 2024 adjacency file: Blaine County, MT; Chouteau County, MT; Musselshell County, MT; Phillips County, MT; Judith Basin County, MT; Wheatland County, MT; Golden Valley County, MT; Petroleum County, MT.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.