A cross-cutting view · under-18 map · 65+ map

Where children and elders
crossed paths

From 2000 to 2023, the region’s under-18 population fell while its 65+ population rose. But that aggregate masks four very different neighborhood patterns. The scatter below plots every neighborhood by its under-18 change (horizontal axis) and its 65+ change (vertical axis) over the same span. Each quadrant is a different pattern: a neighborhood ages, holds, refills or empties.

The four ways a neighborhood ages

Each dot is one neighborhood (NYC NTA or census place outside NYC), 2000 → 2023. Hover for details.
Both rose — growing across generations Both fell — true population decline Kids up, seniors down — family refill Kids down, seniors up — aging in place

The four quadrants

Top five neighborhoods by absolute change in each pattern.
Aging in place
Kids down, seniors up

The dominant pattern: … of the region’s neighborhoods. Longtime homeowners and tenants stayed put as their children moved out and they themselves passed into retirement. Most prevalent in working-class outer-borough neighborhoods (Canarsie, Queens Village, Flatbush) and the older suburbs of Hudson, Bergen and Westchester.

    Growing across generations
    Kids up, seniors up

    … neighborhoods grew at both ends of the age spectrum — meaning a combination of in-migrating families and seniors aging into place or moving in. Includes the Upper West Side (apartment density supporting both), Park Slope, and immigrant-rich neighborhoods like Elizabeth and Far Rockaway.

      Family refill
      Kids up, seniors down

      Only … neighborhoods saw kids rise as seniors fell. Borough Park is the headline case — the Hasidic Jewish community’s high fertility drives up the under-18 count while the smaller older cohort thins out. Hoboken and the Upper East Side belong to a different type: high-rise buildings replacing aging single-resident occupants with new family households.

        True decline
        Kids down, seniors down

        Only … neighborhoods lost residents at both ends. Several are purpose-built complexes whose original cohort is dying or leaving without replacement (Co-op City Bronx). Others are gentrifying neighborhoods where the older population died off and the incoming younger residents skew childless (Greenpoint, Chinatown).

          A few takeaways

          The aging-in-place quadrant is by far the largest. 56% of all neighborhoods follow the pattern of losing kids and gaining seniors. The classic mental model of “urban depopulation” misses it: most of the people who left did so by growing up and moving away from a household that didn’t replace them.

          The four growth-on-both-ends neighborhoods cluster in two types of place: dense Manhattan / north Brooklyn neighborhoods with tall apartment stock (Upper West Side, Park Slope, Riverdale) and immigrant-receiving neighborhoods at the region’s edges (Elizabeth, Rockaway Beach-Arverne-Edgemere, Fort Lee). Both buy you a multigenerational mix — one through density of housing, the other through extended kin networks.

          Borough Park is its own quadrant. No other neighborhood in the region added more than 5,000 children while losing seniors. The Hasidic and Orthodox communities’ fertility rates produce a youth wave large enough to dominate the local age pyramid almost regardless of what happens to the older cohort.

          True population decline is rare. Only 37 neighborhoods (8% of the total) lost residents at both ends of the age spectrum. Some are story-specific (Co-op City’s original 1970s buyers aging out without replacement). Others — Greenpoint, Chinatown, Sunset Park — suggest a gentrification pattern where neither end of the age range grows because the incoming residents are predominantly childless adults.

          Source data: U.S. Census Bureau (decennial 2000/2010/2020 + ACS 5-year 2011–2023). Neighborhood definitions: NYC Planning’s 2020 NTAs inside the five boroughs and TIGER PLACE 2020 outside. Neighborhoods with fewer than 200 children or 200 seniors at both endpoints are excluded.