Le Mars Flag

Le Mars

County:
Plymouth County
County Seat:
Yes
Area (mi²):
8.785
State:
Iowa

Le Mars is a city located in Plymouth County, Iowa. Le Mars has a 2026 population of 10,760. It is also the county seat of Plymouth County. Le Mars is currently declining at a rate of 0% annually and its population has increased by 1.48% since the most recent census, which recorded a population of 10,603 in 2020.

The median household income in Le Mars is $74,701 with a poverty rate of 9.18%. The median age in Le Mars is 39 years: 38.7 years for males, and 39.2 years for females. For every 100 females there are 95.7 males.

10.8K
Total Population
1,225
Density (mi²)

Le Mars Population

Le Mars Population

Year ↓
Population
Growth
Annual Change
202610,76000%
202510,7601551.46%
202410,605-5-0.05%
202310,610-2-0.02%
202210,612-14-0.13%
202110,626460.43%
202010,6035155.11%
201910,0881351.36%
20189,953680.69%
20179,885-59-0.59%
20169,9441281.3%
20159,816150.15%
20149,80160.06%
20139,795270.28%
20129,768120.12%
20119,756-67-0.68%
20109,823-3-0.03%
20009,2377839.26%
19908,4541782.15%
19808,2761171.43%
19708,1591,39220.57%
19606,76792315.79%
19505,8444919.17%
19405,35356511.8%
19304,7881052.24%
19204,68352612.65%
19104,157110.27%
19004,1461102.73%
18904,03600%

Median Age

Overall: 39 years
Female: 39.2 years
Male: 38.7 years

Le Mars Adults

There are 7,964 adults, (1,918 of whom are seniors) in Le Mars.

Sex Ratio

Female: 5,437 (51.1%)
Male: 5,203 (48.9%)

Demographics

The racial composition of Le Mars includes 83.19% White, 5.55% Black or African American, 4.53% other race, and smaller percentages for Native Hawaiian or Pacific Islander, Native American, Asian and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White8,85183.19%
Two or more races6365.98%
Black or African American5905.55%
Other race4824.53%
Native Hawaiian or Pacific Islander710.67%
Native American50.05%
Asian50.05%
Race
Population ↓
Percentage (of total)
Other race4824.53%
Two or more races4724.44%
White1971.85%
Race
Population ↓
Percentage (of total)
White8,65481.33%
Black or African American5905.55%
Two or more races1641.54%
Native Hawaiian or Pacific Islander710.67%
Native American50.05%
Asian50.05%

Le Mars Marital Status

Economics and Income Statistics

Le Mars' average per capita income is $51,431. Household income levels show a median of $74,701. The poverty rate stands at 9.18%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median ↓
Mean
Married Families$100,000-
Families$88,244$101,443
Households$74,701$90,260
Non Families$47,544$65,384

$51,431

Average Income

$74,701

Median Household Income

9.18%

Poverty Rate

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)