Lewis and Clark County Population 2018

Lewis and Clark County's estimated population is 67,773 with a growth rate of 1.47% in the past year according to the most recent United States census data. Lewis and Clark County is the 6th largest county in Montana.

Year Population Growth Growth Rate
201767,7739811.47%
201666,7926540.99%
201566,1385330.81%
201465,6054650.71%
201365,1404180.65%
201264,7224800.75%
201164,2426771.07%
201063,56516,07033.84%
199047,4954,45610.35%
198043,0399,75829.32%
197033,2815,27518.84%
196028,0063,46614.12%
195024,5402,40910.89%
194022,1313,90721.44%
193018,224-436-2.34%
192018,660-3,193-14.61%
191021,8532,68213.99%
190019,171260.14%
189019,14512,624193.59%
18806,5211,48129.38%
18705,0400.00%

Lewis and Clark County Population Growth

Population Data via

Lewis and Clark County Race Data

Race Population Percentage
White62,61892.39%
Two or More Races1,5762.33%
American Indian and Alaska Native1,4292.11%
Asian4790.71%
Black or African American3170.47%
Native Hawaiian and Other Pacific Islander600.09%

Lewis and Clark County Population Pyramid

0k1k1k2k2k3k Male Population0k1k1k2k2k3k Female Population8580757065605550454035302520151050
Data Sources
  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990