All counties →

Flathead County, MT Demographics

Flathead County, MT is the 4th most populous of 56 counties in Montana, with 104,357 residents across 5,087 square miles. That is about 21 people per square mile.

At the 2020 census

Population 104,357
Land area 5,087 sq mi
Density 21 / sq mi

Data: 2020 Census · American Community Survey 2024

How Flathead County compares to the US

We're computing this county's comparison table — check back shortly. Population, land area, and density above are already exact.

Central Location: Flathead County, MT

Measured from the county's main population center using 2020 census blocks.

We're computing the drive-time and radius areas around Flathead County, MT — check back shortly. Meanwhile you can drop a pin anywhere in the radius tool.

Census tracts in Flathead County, MT

Name Population Sq mi Per sq mi
Census Tract 7 6,239 6.4 979
Census Tract 8.02 6,195 22.5 275
Census Tract 6.01 5,482 41.1 133
Census Tract 2.01 5,127 67.1 76
Census Tract 2.03 4,762 4.6 1,035
Census Tract 12.02 4,702 11.5 410
Census Tract 17.01 4,622 148.3 31
Census Tract 6.02 4,198 57.2 73
Census Tract 13.06 4,057 66.4 61
Census Tract 9.03 3,588 1.5 2,416
Census Tract 4.04 3,483 10.2 343
Census Tract 11.02 3,337 0.9 3,634
Census Tract 4.02 3,226 21.6 149
Census Tract 8.01 3,155 3.8 839
Census Tract 12.01 3,149 4.5 707
Census Tract 14.02 3,134 53.6 58
Census Tract 3.01 3,096 22.3 139
Census Tract 14.01 3,051 41.2 74
Census Tract 2.02 3,007 24.6 122
Census Tract 11.01 2,677 0.7 3,784
Census Tract 4.03 2,564 8.7 295
Census Tract 1.02 2,519 1,725.6 1
Census Tract 17.03 2,212 700.2 3
Census Tract 17.02 2,180 104.1 21
Census Tract 9.01 2,167 0.7 3,244
Census Tract 9.02 2,148 0.8 2,606
Census Tract 13.03 2,044 12.8 160
Census Tract 10 2,040 0.6 3,679
Census Tract 13.04 1,880 8.8 214
Census Tract 3.02 1,829 63.8 29
Census Tract 13.05 1,533 41.1 37
Census Tract 1.01 954 1,810.3 1

Related places

Metro areas containing Flathead County

About this page

This page shows demographics for a US county from the 2020 census and the American Community Survey: population, land area, density, urban share, and how the county compares to national averages for income, housing, age, and more.

Counties subdivide into census tracts, listed below with their populations. The drive-time and radius tables measure the population around the county's main population center.

Read how BlockAtlas computes population within an area →