Also See Coal Township, PA: ZIP Codes & Maps
The Marshallton CDP(1) had a population of 1,337 as of July 1, 2025.
The primary coordinate point for Marshallton is located at latitude 40.7868 and longitude -76.5394 in Northumberland County. The formal boundaries for the Marshallton Census Designated Place encompass a land area of 0.87 sq. miles and a water area of 0.02 sq. miles. Northumberland County is in the Eastern time zone (GMT -5).
The Marshallton Census Designated Place has a U1 Census Class Code which indicates a census designated place with an official federally recognized name. It also has a Functional Status Code of "S" which identifies a statistical entity.
The Marshallton Census Designated Place is located within Township of Coal, a minor civil division (MCD) of Northumberland County.
POPULATION | |
|---|---|
| Total Population | 1,337 (100%) |
| Population in Households | 1,337 (100.0%) |
| Population in Families | 983 (73.5%) |
| Population in Group Quarters1 | 0 |
| Population Density | 1,542 |
| Diversity Index2 | 27 |
INCOME | |
| Median Household Income | $50,597 |
| Average Household Income | $63,910 |
| % of Income for Mortgage4 | 13% |
| Per Capita Income | $28,728 |
| Wealth Index5 | 47 |
| Socioeconomic Status Index6 | Moderate (47.0) |
HOUSING | |
|---|---|
| Total HU (Housing Units) | 736 (100%) |
| Owner Occupied HU | 437 (59.4%) |
| Renter Occupied HU | 164 (22.3%) |
| Vacant Housing Units | 135 (18.3%) |
| Median Home Value | $103,241 |
| Average Home Value | $150,063 |
| Housing Affordability Index3 | 166 |
HOUSEHOLDS | |
| Total Households | 601 |
| Average Household Size | 2.22 |
| Family Households | 310 |
| Average Family Size | 3.00 |
GROWTH RATE / YEAR |
2020-2025 | 2025-2030 |
|---|---|---|
| Population | -0.16% | -0.32% |
| Households | 0.78% | 0.03% |
| Families | 0.00% | |
| Median Household Income | 1.73% | |
| Per Capita Income | 3.04% | |
| Owner Occupied HU | 0.36% |
The table below compares Marshallton 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 | # 850 | 58th |
| Population Density | # 890 | 56th |
| Median Household Income | # 1772 | 12th |
| Housing Affordability Index | # 1761 | 88th |
| Per Capita Income | # 1671 | 17th |
| Diversity Index | # 754 | 62nd |
Additional comparisons and rankings can be made with a VERY EASY TO USE Pennsylvania Census Data Comparison Tool.
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