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  3. Mercer County, NJ
New Jersey (NJ)Trenton-Princeton609640

Mercer County, NJ

Trenton-Princeton metro * 408.6K residents

Compare

408.6K

Population

$113.8K

Median income

per household

$413.4K

Home value

9.9%

Poverty rate

What stands out

  • Median household income: $113.8K (top 10% vs US counties).
  • Median home value: $413.4K (top 10% vs US counties).
  • Poverty rate: 9.9% (low poverty; bottom quartile vs US counties).

Categories vs U.S.

Economy

5 of 6 metrics better than U.S. benchmarks

Median household income

$113.8K

U.S.

$81K

Median home value

$413.4K

U.S.

$333K

Poverty rate

9.9%

U.S.

12.4%

Housing stress

Rent-burdened renters (≥30%)

48.6%

U.S.

51.1%

Severely rent-burdened (≥50%)

24.8%

U.S.

25.9%

Affordability Ratios

Rent-to-Income

18.4%

Below 30% threshold

Home-Value-to-Income

3.6×

Within typical 3-5x range

Income distribution

Share of households by income bracket (ACS).

< $50k
26.9%
$50–100k
22.8%
$100–200k
28.2%
$200k+
22.1%
See Trenton-Princeton metro economy →See NJ state economy →

Health

5 of 6 available metrics better than U.S.

Obesity

25.4%

U.S.

33.2%

Diabetes

11.1%

U.S.

12.1%

Current smoking

10.5%

U.S.

12.8%

See Trenton-Princeton metro health data →See NJ state health data →

Connectivity

3 of 3 metrics better than U.S.

Best available speed

1,000Mbps

Gigabit speeds reported

100+ Mbps coverage

98.7%

U.S.

85.3%

Gigabit ready

10.8%

U.S.

8.6%

5G available

98.6%

U.S.

77.4%

See Trenton-Princeton metro connectivity →See NJ state connectivity →

Map

Mercer County, NJ

Population

408.6K

Area

224.5 sq mi

Density

1.8K/sq mi

Neighbors

Burlington County, NJHunterdon County, NJMiddlesex County, NJMonmouth County, NJSomerset County, NJBucks County, PA
Data Sources & Notes

Data freshness

ACS 5-year
2020–2024
CDC PLACES
2025
BLS (LAUS)
2025-12
Broadband
2020-12
Mobile coverage
2025-11-24
Page updated
2026-02-23

Release schedule and upstream dates: Sources.

Data sources

U.S. Census (ACS 5-year)U.S. Census TIGER/LineCDC PLACESBLS (LAUS)FCC (Form 477 broadband)FCC (Mobile Broadband Data Collection)

Derived statistics

  • ACS county metrics (income, housing, demographics) are sourced directly from Census county-level tables.
  • CDC health metrics are sourced from county-level CDC PLACES data.
  • Unemployment is sourced from the BLS Local Area Unemployment Statistics (LAUS) program.
  • Population density is computed as population ÷ land area.

Data accuracy & methodology

County pages use 2020–2024 ACS 5-year county-level estimates sourced directly from Census county tables. CDC health metrics come from county-level CDC PLACES. Unemployment rates come from the BLS LAUS program. Connectivity metrics use FCC coverage data.