South New Castle, Pennsylvania Demographics & Population 2026

A note before these figures: with a population of 712, South New Castle's ACS estimates come from a small number of survey responses and carry wide margins of error. Individual percentages below — particularly rates that round to 0% or 100% — are approximations, not precise measurements. See data.census.gov for the published margins of error.

Population Overview

South New Castle is a small community located in Pennsylvania, within Lawrence County. The total population is 712. It ranks as the 1173rd most populous out of 1,991 Census-designated places in Pennsylvania.

Age Demographics

The median age in South New Castle is 42.3 years. This is 3% higher than the state median of 40.9 years.

Economy, Income & Housing

The median household income in South New Castle is $69,375. This is 11% lower than the state median of $77,971. It is also 14% lower than the national median of $80,734. The poverty rate stands at 5.9%. This is 50% lower than the state poverty rate of 11.7%. The unemployment rate is 5.9%. This is 13% higher than the state rate of 5.3%. The median home value is $104,100. Housing costs are 59% lower than the state median of $254,500. With a home-value-to-income ratio of just 1.5x, South New Castle is one of the most affordable housing markets in the area. 85.9% of occupied housing units are owner-occupied. This homeownership rate is 24% higher than the state average of 69.3%.

Race & Ethnicity

South New Castle has a predominantly White (non-Hispanic) population, comprising 91.6% of all residents. Hispanic or Latino residents account for 1.3%. The Black or African American population (1.0%) is well below the state average of 10.3%. The Hispanic or Latino population (1.3%) is well below the state average of 8.7%.

Education

22.0% of residents aged 25 and older hold a bachelor's degree or higher. This is 37% lower than the state rate of 35.2%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 87.7%.

Data Sources & Methodology

All demographic data for South New Castle, Pennsylvania is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Pennsylvania state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,991 Census-designated places in Pennsylvania. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.