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Thornburg, PA Profile: Facts & Data

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Thornburg, Pennsylvania - Basic Facts

The Borough of Thornburg had a population of 470 as of July 1, 2025.

The primary coordinate point for Thornburg is located at latitude 40.4345 and longitude -80.0823 in Allegheny County. The formal boundaries for the Borough of Thornburg encompass a land area of 0.44 sq. miles and a water area of 0 sq. miles. Allegheny County is in the Eastern time zone (GMT -5).

The Borough of Thornburg 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.


Jump to... (On This Page!)
  1. Thornburg 2025 Demographic Data
  2. Growth Rates for Thornburg (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. Pennsylvania Research Tools (Easy Tools & Current Data)
  3. Pennsylvania Data Comparison Tool - 2025 Demographics
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Thornburg, PA Data & Demographics (As of July 1, 2025)

POPULATION

Total Population 470 (100%)
Population in Households 470 (100.0%)
Population in Families 423 (90.0%)
Population in Group Quarters1 0
Population Density 1,074
Diversity Index2 19
 
 

INCOME

Median Household Income $209,132
Average Household Income $262,898
% of Income for Mortgage4 14%
Per Capita Income $102,362
Wealth Index5 332
Socioeconomic Status Index6 High (76.3)
 

HOUSING

Total HU (Housing Units) 186 (100%)
Owner Occupied HU 177 (95.2%)
Renter Occupied HU 6 ( 3.2%)
Vacant Housing Units 3 ( 1.6%)
Median Home Value $470,408
Average Home Value $545,056
Housing Affordability Index3 153
 

HOUSEHOLDS

Total Households 183
Average Household Size 2.57
Family Households 152
Average Family Size 3.00
NOTES
  1. 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.
  2. 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.
  3. 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.
  4. 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).
  5. 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.
  6. 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 0.16% 0.09%
Households 0.21% 0.11%
Families   0.13%
Median Household Income   1.52%
Per Capita Income   1.68%
Owner Occupied HU   0.11%

Thornburg, PA - Peer Comparisons by Rank and Percentile

The table below compares Thornburg 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 # 1388 31st
Population Density # 1100 45th
Median Household Income # 7 100th
Housing Affordability Index # 1669 83rd
Per Capita Income # 7 100th
Diversity Index # 1049 47th

Additional comparisons and rankings can be made with a VERY EASY TO USE Pennsylvania Census Data Comparison Tool.

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