Jeffers vs Mammoth

A side-by-side comparison of Jeffers and Mammoth: population, income, housing, and more.

Jeffers and Mammoth are places in Montana. This page compares them across population, income, housing, education, commuting, and how each has changed since 2019.

Jeffers has the higher population (52 vs 17 in Mammoth).

Population, income & housing

	Jeffers	Mammoth
Population	52	17
Median age	67.2 yrs	—
Housing units	30	46
Homeownership rate	100.0%	100.0%
Bachelor's degree or higher	40.4%	100.0%

Trends (ACS 5-year, 2019–2023)

	Jeffers	Mammoth
Population	17 → 52 (+205.9%)	0 → 17 (+0.0%)

Jeffers

Population

1752

Mammoth

Population

017

Age & race/ethnicity

Age distribution (share)

	Jeffers	Mammoth
Under 5	0.0%	0.0%
5 to 17	0.0%	0.0%
18 to 24	0.0%	0.0%
25 to 34	0.0%	0.0%
35 to 44	0.0%	0.0%
45 to 54	0.0%	0.0%
55 to 64	40.4%	0.0%
65 to 74	42.3%	0.0%
75 and over	17.3%	100.0%

Race & ethnicity (share)

	Jeffers	Mammoth
White (non-Hispanic)	100.0%	100.0%
Black or African American	0.0%	0.0%
American Indian & Alaska Native	0.0%	0.0%
Asian	0.0%	0.0%
Native Hawaiian & Pacific Islander	0.0%	0.0%
Some other race	0.0%	0.0%
Two or more races	0.0%	0.0%
Hispanic or Latino	0.0%	0.0%

Educational attainment (age 25+)

Share of adults 25+

	Jeffers	Mammoth
No high school diploma	0.0%	0.0%
High school graduate	17.3%	0.0%
Some college or associate's	42.3%	0.0%
Bachelor's degree	0.0%	100.0%
Graduate or professional degree	40.4%	0.0%

Housing

Units in structure (share)

	Jeffers	Mammoth
1-unit, detached	100.0%	93.5%
1-unit, attached	0.0%	0.0%
2 to 4 units	0.0%	0.0%
5 to 19 units	0.0%	0.0%
20 or more units	0.0%	0.0%
Mobile home & other	0.0%	6.5%

Poverty & households

	Jeffers	Mammoth
Poverty rate	17.3%	0.0%
Average household size	1.73	1.70
Median year structure built	—	1972