Lewis and Clark County MT Information


Lewis and Clark County Subdivisions

Lewis and Clark County MT Data & Demographics (As of July 1, 2015)


Total Population 66,332
Population in Households 64,386
Population in Familes 49,835
Population in Group Qrtrs 1,946
Population Density1 19
Diversity Index2 19


Total Households 28,328
Average Household Size 2.27
Family Households 17,560
Average Family Size 3


Total Housing Units 32,057 (100%)
Owner Occupied HU 18,800 (58.6%)
Renter Occupied HU 9,528 (29.7%)
Vacant Housing Units 3,729 (11.6%)
Median Home Value $212,308
Average Home Value $251,266


Median Household Income $55,723
Average Household Income $68,923
Per Capita Income $29,503
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 0.87% 0.87%
Households 1.14% 0.97%
Families 0.96% 0.86%
Median Household Income   2.98%
Per Capita Income   2.76%
1) Population Density = Total Population per square mile.
2) The Diversity Index is a scale of 0 to 100 that represents the likelyhood 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.
Based on Census 2010 counts, the Diversity Index for the United States was 60.6 and it is expected to increase to 64.8 by July 1, 2018.


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, 2015 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 Density1 # 7 89th
Diversity Index2 # 22 63rd
Median Household Income # 4 95th
Per Capita Income # 7 89th

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