Monongahela

County:: Washington County
County Seat:: No
Area (mi²):: 1.913
State:: Pennsylvania

Monongahela is a city located in Washington County, Pennsylvania. Monongahela has a 2025 population of 4,047. Monongahela is currently declining at a rate of -0.49% annually and its population has decreased by -2.41% since the most recent census, which recorded a population of 4,147 in 2020.

The average household income in Monongahela is $72,220 with a poverty rate of 12.13%.The median age in Monongahela is 44.1 years: 41.2 years for males, and 48 years for females.

Demographics

The racial composition of Monongahela includes 93.44% White, and smaller percentages for Black or African American, other race and multiracial populations.

Population by Race

Race	Population	Percentage (of total)
White	3,843	93.44%
Two or more races	150	3.65%
Black or African American	72	1.75%
Other race	48	1.17%

Monongahela Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Monongahela's average per capita income is $41,742. Household income levels show a median of $55,500. The poverty rate stands at 12.13%.

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	$84,753	-
Families	$79,500	$94,544
Households	$55,500	$72,220
Non Families	$31,667	$42,202

$41,742

Average Income

$55,500

Median Household Income

12.13%

Poverty Rate