Monongahela, PA Profile: Facts & Data

Monongahela, Pennsylvania - Basic Facts

The City of Monongahela had a population of 4,109 as of July 1, 2025.

The primary coordinate point for Monongahela is located at latitude 40.2031 and longitude -79.9262 in Washington County. The formal boundaries for the City of Monongahela encompass a land area of 1.91 sq. miles and a water area of 0.22 sq. miles. Washington County is in the Eastern time zone (GMT -5).

The City of Monongahela has a C5 Census Class Code which indicates an active incorporated place that is independent of any county subdivision and serves as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

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Monongahela, PA Data & Demographics (As of July 1, 2025)

POPULATION
Total Population	4,109 (100%)
Population in Households	4,098 (99.7%)
Population in Families	2,892 (70.4%)
Population in Group Quarters¹	11 ( 0.3%)
Population Density	2,148
Diversity Index²	28


INCOME
Median Household Income	$59,112
Average Household Income	$76,336
% of Income for Mortgage⁴	16%
Per Capita Income	$36,491
Wealth Index⁵	53
Socioeconomic Status Index⁶	Moderate (48.1)

HOUSING
Total HU (Housing Units)	2,244 (100%)
Owner Occupied HU	1,220 (54.4%)
Renter Occupied HU	744 (33.2%)
Vacant Housing Units	280 (12.5%)
Median Home Value	$148,138
Average Home Value	$200,914
Housing Affordability Index³	139

HOUSEHOLDS
Total Households	1,964
Average Household Size	2.09
Family Households	1,024
Average Family Size	3.00

HOUSING

Total HU (Housing Units)

2,244 (100%)

Owner Occupied HU

1,220 (54.4%)

Renter Occupied HU

744 (33.2%)

Vacant Housing Units

280 (12.5%)

Median Home Value

$148,138

Average Home Value

$200,914

Housing Affordability Index³

139

HOUSEHOLDS

Total Households

1,964

Average Household Size

2.09

Family Households

1,024

Average Family Size

3.00

NOTES

Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different races 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.
The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.
The Socioeconomic Index ranges from zero (lowest relative status) to 100 (highest relative status). This measure quantifies disparities in social position of an area's inhabitants and is built from a broad range of demographic, housing, and socioeconomic inputs. More information on this measure can be found in Esri's SEI tutorial.

GROWTH RATE / YEAR	2020-2025	2025-2030
Population	-0.23%	-0.18%
Households	0.02%	0.04%
Families		-0.06%
Median Household Income		2.64%
Per Capita Income		2.35%
Owner Occupied HU		0.47%

GROWTH RATE / YEAR

2020-2025

2025-2030

Population

-0.23%

-0.18%

Households

0.02%

0.04%

Families

-0.06%

Median Household Income

2.64%

Per Capita Income

2.35%

Owner Occupied HU

0.47%

Monongahela, PA - Peer Comparisons by Rank and Percentile

The table below compares Monongahela to the other 2,002 incorporated cities, towns and CDPs in Pennsylvania by rank and percentile using July 1, 2025 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	# 348	83rd
Population Density	# 658	67th
Median Household Income	# 1499	25th
Housing Affordability Index	# 1544	77th
Per Capita Income	# 1049	48th
Diversity Index	# 721	64th

Variable Description

Rank

Percentile

Total Population

# 348

83rd

Population Density

# 658

67th

Median Household Income

# 1499

25th

Housing Affordability Index

# 1544

77th

Per Capita Income

# 1049

48th

Diversity Index

# 721

64th

Pennsylvania Census Data Comparison Tool

Monongahela, PA Profile: Facts & Data

Monongahela, Pennsylvania - Basic Facts

Monongahela, PA Data & Demographics (As of July 1, 2025)

POPULATION

INCOME

HOUSING

HOUSEHOLDS

GROWTH RATE / YEAR

Monongahela, PA - Peer Comparisons by Rank and Percentile

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