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  3. Jefferson County, IL
Illinois (IL)Mount Vernon618730

Jefferson County, IL

Mount Vernon metro * 35.6K residents

Compare

35.6K

Population

$62.9K

Median income

per household

$124.6K

Home value

13.3%

Poverty rate

What stands out

  • Median household income: $62.9K.
  • Median home value: $124.6K (bottom quartile vs US counties).
  • Poverty rate: 13.3%.

Categories vs U.S.

Economy

0 of 6 metrics better than U.S. benchmarks

Median household income

$62.9K

U.S.

$81K

Median home value

$124.6K

U.S.

$333K

Poverty rate

13.3%

U.S.

12.4%

Housing stress

Rent-burdened renters (≥30%)

43.0%

U.S.

51.1%

Severely rent-burdened (≥50%)

22.4%

U.S.

25.9%

Affordability Ratios

Rent-to-Income

16.3%

Below 30% threshold

Home-Value-to-Income

2.0×

Within typical 3-5x range

Income distribution

Share of households by income bracket (ACS).

< $50k
38.7%
$50–100k
34.2%
$100–200k
22.4%
$200k+
4.7%
See Mount Vernon metro economy →See IL state economy →

Health

0 of 6 available metrics better than U.S.

Obesity

39.8%

U.S.

33.2%

Diabetes

13.0%

U.S.

12.1%

Current smoking

16.1%

U.S.

12.8%

See Mount Vernon metro health data →See IL state health data →

Connectivity

1 of 3 metrics better than U.S.

Best available speed

1,000Mbps

Gigabit speeds reported

100+ Mbps coverage

62.5%

U.S.

85.3%

Gigabit ready

0.4%

U.S.

8.6%

5G available

79.4%

U.S.

77.4%

See Mount Vernon metro connectivity →See IL state connectivity →

Map

Jefferson County, IL

Population

35.6K

Area

571.2 sq mi

Density

62.4/sq mi

Neighbors

Franklin County, ILHamilton County, ILMarion County, ILPerry County, ILWashington County, ILWayne County, IL
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.