Editing Gallatin County, Montana (section)

===2020 census===
As of the [[2020 United States census|2020 census]], there were 118,960 people and 46,990 households living in the county.<ref name=":0">{{Cite web |title=Explore Census Data |url=https://data.census.gov/cedsci/profile?g=0500000US30031 |access-date=January 23, 2022 |website=data.census.gov}}</ref> The population density was {{Convert|45.2|PD/sqmi|PD/km2}}. There were 52,835 housing units in the county at an average density of {{Convert|20.1|/sqmi|/km2}}.<ref name=":0" /> The racial make of the county was 89.0% White, 1.2% Asian, 0.9% American Indian, 0.4% Black of African American, 0.1% Pacific Islander, 1.8% from other races, and 6.6% from two or more races. Those of Hispanic of Latino origin made up 5.0% of the population.<ref>{{Cite web |last=Star |first=Indianapolis |title=Gallatin County, Montana Demographics and Housing 2020 Decennial Census |url=https://data.indystar.com/census/total-population/total-population-change/gallatin_county_montana/050-30031/ |access-date=January 23, 2022 |website=Indianapolis Star |language=en}}</ref> In terms of ancestry, 25.4% were German, 14.8% were Irish, 12.4% were English, 8.8% were Norwegian, 4.6% were Italian, 4.0% were French, 3.5% were Scottish, 2.2% were Polish and 0.3% were Subsaharan African.<ref name=":0" />

Of the 46,990 households, 48.2% were a Married-couple family household, 23.9% were a "Male householder, no spouse present, family household", and 20.4% were a "Female householder, no spouse present, family household". The averager family size was 2.96 in the county. The median age was 33.1 years old, compared with 40.1 in Montana.<ref name=":0" />

The median income for a household in the county was $75,418 in the county, significantly higher than the $57,153 median household income in all of Montana. 11.9% of the population was below the poverty line, including 6.9% of those under 18 and 6.5% of those over 65.