Lewis and Clark County MT Information


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, 2014 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 # 23 61st
Median Household Income # 4 95th
Per Capita Income # 3 96th

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


Lewis and Clark County MT Data & Demographics (As of July 1, 2014)


Total Population 66,033
Population in Households 64,079
Population in Familes 49,669
Population in Group Qrtrs 1,954
Population Density1 19
Diversity Index2 17


Total Households 28,154
Average Household Size 2.28
Family Households 17,496
Average Family Size 3


Total Housing Units 31,844 (100%)
Owner Occupied HU 18,822 (59.1%)
Renter Occupied HU 9,332 (29.3%)
Vacant Housing Units 3,690 (11.6%)
Median Home Value $202,269
Average Home Value $240,081


Median Household Income $53,969
Average Household Income $70,452
Per Capita Income $30,107
  (Compound Annual Growth Rates)


2010-2014 2014-2019
Population 0.96% 0.94%
Households 1.26% 1.06%
Families 1.09% 0.96%
Median Household Income   2.56%
Per Capita Income   2.97%
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.

Information Updates

The Demographic Data for the 955 Montana cities, towns, counties, ZIP Codes and Census Designated Places (CDPs) profiled in this gazetteer is updated annually. Last Update: July 1, 2014.

The ZIP Code maps and the data regarding the number of residential and business addresses in each ZIP Code are updated four times per year. Last Update: November 1, 2014.

The information on the 77,486 Montana Physical, Cultural and Historic Features is updated six times per year. Last Update: December 2, 2014.

The School Attendance Zone Maps for 852 Montana public schools are updated four times per year. Last Update: October 6, 2014.