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Gallatin County, Montana facts for kids

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Gallatin County
Gallatin County Courthouse in Bozeman
Gallatin County Courthouse in Bozeman
Official seal of Gallatin County
Seal
Map of Montana highlighting Gallatin County
Location within the U.S. state of Montana
Map of the United States highlighting Montana
Montana's location within the U.S.
Country  United States
State  Montana
Founded 1865
Named for Gallatin River (Albert Gallatin)
Seat Bozeman
Largest city Bozeman
Area
 • Total 2,632 sq mi (6,820 km2)
 • Land 2,603 sq mi (6,740 km2)
 • Water 29 sq mi (80 km2)  1.1%
Population
 (2020)
 • Total 118,960
 • Estimate 
(2022)
124,938 Increase
 • Density 45.198/sq mi (17.451/km2)
Time zone UTC−7 (Mountain)
 • Summer (DST) UTC−6 (MDT)
Congressional district 1st
  • Montana county number 06

Gallatin County is a special area, like a big district, in the state of Montana. Its main town, called the county seat, is Bozeman. It is the second-most populated county in Montana. In 2020, about 118,960 people lived here.

The county has amazing natural features. You can see the Bridger Mountains in the north. To the south are the Gallatin Mountains and the Gallatin River. Meriwether Lewis named the river in 1805. He named it after Albert Gallatin, who was a very important government official at the time. Gallatin helped plan the famous Lewis and Clark Expedition.

A big part of Yellowstone National Park is close to Gallatin County. The entrance at West Yellowstone brings many visitors to the park. Also, Big Sky Resort is partly in Gallatin County. It is one of the biggest ski resorts in the United States. Big Sky is located between Bozeman and West Yellowstone.

History of Gallatin County

During the early days of Montana, there was a small piece of land called "Lost Dakota." This land was part of Dakota Territory, far away from the rest of it. In 1873, Lost Dakota became part of Gallatin County, Montana.

Exploring Gallatin County's Geography

Gallatin County covers a large area. It has about 2,632 square miles in total. Most of this is land (2,603 square miles), and a small part is water (29 square miles).

The county's borders changed in 1978. A part of Yellowstone National Park that was its own special area was split up. It was divided between Gallatin County and Park County. This change added more land and water to Gallatin County.

Main Roads in Gallatin County

Many important roads run through Gallatin County. These roads help people travel around the county and connect to other places.

  • I-90.svg Interstate 90
  • US 20.svg U.S. Highway 20
  • US 191.svg U.S. Highway 191
  • US 287.svg U.S. Highway 287
  • MT-2.svg Montana Highway 2
  • MT-64.svg Montana Highway 64
  • MT-84.svg Montana Highway 84
  • MT-85.svg Montana Highway 85
  • MT-86.svg Montana Highway 86
  • MT-sec-205.svg Montana Secondary Highway 205

Nearby Counties

Gallatin County shares its borders with several other counties. Some are in Montana, and others are in neighboring states.

Protected Natural Areas

Parts of two important protected areas are in Gallatin County:

People of Gallatin County

The number of people living in Gallatin County has grown a lot over the years.

Historical population
Census Pop.
1870 1,578
1880 3,643 130.9%
1890 6,246 71.5%
1900 9,553 52.9%
1910 14,079 47.4%
1920 15,864 12.7%
1930 16,124 1.6%
1940 18,269 13.3%
1950 21,902 19.9%
1960 26,045 18.9%
1970 32,505 24.8%
1980 42,865 31.9%
1990 50,463 17.7%
2000 67,831 34.4%
2010 89,513 32.0%
2020 118,960 32.9%
2022 (est.) 124,938 39.6%
U.S. Decennial Census
1790–1960, 1900–1990,
1990–2000, 2010–2020

2020 Census Information

In 2020, the census counted 118,960 people in Gallatin County. There were also 46,990 households. A household is a group of people living together. The average family size was about three people.

Most people in the county (89%) were White. Other groups included Asian, American Indian, and Black or African American people. About 5% of the population was of Hispanic or Latino background. The average age of people in the county was 33.1 years old.

The average income for a household in Gallatin County was about $75,418. This was higher than the average income for all of Montana. About 11.9% of the people lived below the poverty line. This means they had a very low income.

Communities in Gallatin County

Gallatin County has several towns and cities. Each one has its own unique feel.

Cities

Towns

Other Communities

There are also many smaller communities and places where people live. These are called census-designated places or unincorporated communities.

Education in Gallatin County

Gallatin County has many schools for kids of all ages. Some school districts cover both elementary and high school. Others are just for high school or elementary school.

Unified School Districts (K-12)

These districts teach students from kindergarten all the way through 12th grade.

  • Big Sky School K-12
  • West Yellowstone K-12

High School Districts

These districts focus on high school education.

  • Belgrade High School District
  • Bozeman High School District
  • Manhattan High School District
  • Three Forks High School District
  • Willow Creek High School District

Elementary School Districts

These districts focus on elementary school education.

  • Amsterdam Elementary School District
  • Anderson Elementary School District
  • Belgrade Elementary School District
  • Bozeman Elementary School District
  • Cottonwood Elementary School District
  • Gallatin Gateway Elementary School District
  • LaMotte Elementary School District
  • Malmborg Elementary School District
  • Manhattan School
  • Monforton Elementary School District
  • Pass Creek Elementary School District
  • Shields Valley Elementary School District
  • Springhill Elementary School District
  • Three Forks Elementary School District
  • Willow Creek Elementary School District

Notable People from Gallatin County

Some well-known people have lived or worked in Gallatin County.

  • Zales Ecton was a U.S. Senator from Montana. He lived in Gallatin County.
  • Stan Jones is a politician who lives and works in Gallatin County.
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