Census division 2
The Middle Atlantic division
The Middle Atlantic division has 3 states with 42,446,850 residents in the Census Vintage 2024 estimates, 12.5% of the US total, on 99,221 square miles of land. It ranks 5th of 9 divisions by population and 8th by land area.
- Residents 2024
- 42,446,850
- 12.5% of the US
- Land area
- 99,221 sq mi
- Density
- 427.8 / sq mi
- Member states
- 3
- 150 counties
Member states shaded by density; others hatched. Pins mark capitals.
Middle Atlantic population and land
The Middle Atlantic division has 3 states with 42,446,850 residents in the Census Vintage 2024 estimates, 12.5% of the US total, on 99,221 square miles of land. It ranks 5th of 9 divisions by population and 8th by land area. It averages 427.8 people per square mile, 4.4 times the national figure of 96.3, and ranks 1st of 9 by density.
New York is the most populous member with 19,867,248 residents, 47% of the division, and it is also the largest by land. New Jersey is the least populous, with 9,500,851.
States in the Middle Atlantic division
The Census Bureau groups the states into 4 regions and 9 divisions for statistics. Middle Atlantic is division 2, part of the Northeast region. Totals below are sums of Vintage 2024 county estimates and 2024 Gazetteer land area.
| State | Residents | Share | Land sq mi | Per sq mi | Counties |
|---|---|---|---|---|---|
| New York | 19,867,248 | 46.8% | 47,123 | 421.6 | 62 |
| Pennsylvania | 13,078,751 | 30.8% | 44,742 | 292.3 | 67 |
| New Jersey | 9,500,851 | 22.4% | 7,355 | 1,291.8 | 21 |
Counties in the Middle Atlantic division
Its 150 county-equivalents have a median of 108,027 residents, 4.1 times the national median county of 26,122. The most populous is Kings County, NY, with 2,617,631; the largest by land is St. Lawrence County, NY, at 2,680 square miles.
The median county household income here is $69,306 in SAIPE 2023, 10% above the national median county, $62,851. It ranges from $46,894 in Bronx County, NY to $140,466 in Nassau County, NY.
- 01Kings County, NY2,617,631
- 02Queens County, NY2,316,841
- 03New York County, NY1,660,664
- 04Philadelphia County, PA1,573,916
- 05Suffolk County, NY1,535,909
- 06Nassau County, NY1,392,438
- 07Bronx County, NY1,384,724
- 08Allegheny County, PA1,231,814
- 09Westchester County, NY1,006,447
- 10Bergen County, NJ978,641
Distances and center
The two member capitals farthest apart are Albany and Harrisburg, 231 miles in a straight line. Weighting every county's internal point by population puts the division's center of population near 40.93° N, 75.28° W. The method is explained in the center of population guide.
Bordering states compared
3 pairs of member states share a border. Each comparison puts population, land, counties and capitals side by side.
Questions people ask
What states are in the Middle Atlantic division?
New Jersey, New York, Pennsylvania, per the Census Bureau's regions and divisions.
What is the population of the Middle Atlantic division?
42,446,850 in the Census Vintage 2024 estimates, 12.5% of the US.
What is the largest state in the Middle Atlantic division?
New York, both by land (47,123 square miles) and by population (19,867,248).
What is the most populous county in the Middle Atlantic division?
Kings County, NY, with 2,617,631 residents.
Which Census region is the Middle Atlantic division in?
The Northeast region, which also includes the New England division.
Sources and data as of
Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.
- 01Census Bureau regions and divisions of the United States (last verified 2026-09-30)
- 02Census Vintage 2024 county population estimates
- 03Census 2024 Gazetteer, counties
- 04Census SAIPE 2023 state and county estimates
How every number is computed: methodology. Spotted a wrong figure? Report an error.