Lewis and Clark County MT Information


Lewis and Clark County Subdivisions

Lewis and Clark County MT Data & Demographics (As of July 1, 2017)


Total Population 67,925
Daytime Population: Workers 37,879
Daytime Population: Residents 33,278
Total Daytime Population (TDP) 71,157
Ratio TDP/Total Population1 1.05
Population in Households 65,979
Population in Familes 50,688
Population in Group Qrtrs 1,946
Population Density2 20
Diversity Index3 20


Median Household Income $55,218
Average Household Income $73,180
Per Capita Income $31,221


Total Housing Units 32,335 (100%)
Owner Occupied HU 18,948 (58.6%)
Renter Occupied HU 9,659 (29.9%)
Vacant Housing Units 3,728 (11.5%)
Median Home Value $218,075
Average Home Value $247,403


Total Households 28,607
Average Household Size 2.31
Family Households 17,505
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2017 2017-2022
Population 0.96% 0.94%
Households 0.96% 0.95%
Families 0.65% 0.76%
Median Household Income   3.22%
Per Capita Income   3.33%


Lewis and Clark County MT - Peer Comparisons by Rank and Percentile

The table below compares Lewis and Clark County to the other 56 counties and county equivalents in Montana by rank and percentile using July 1, 2017 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 6 91st
Population Density # 7 88th
Diversity Index # 22 63rd
Median Household Income # 4 95th
Per Capita Income # 6 91st

Additional comparisons and rankings can be made with a VERY EASY TO USE Montana Census Data Comparison Tool.