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, Native American, Asian, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Two or more races

Black or African American

Other race

Native American

Asian

Native Hawaiian or Pacific Islander

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%
Native American	0	0%
Asian	0	0%
Native Hawaiian or Pacific Islander	0	0%

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