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  3. Monroe County, IL
Illinois (IL)St. Louis618730

Monroe County, IL

St. Louis metro * 35.4K residents

Compare

35.4K

Population

$103.7K

Median income

per household

$290.2K

Home value

5.1%

Poverty rate

What stands out

  • Median household income: $103.7K (top 10% vs US counties).
  • Median home value: $290.2K (top quartile vs US counties).
  • Poverty rate: 5.1% (low poverty; bottom 10% vs US counties).

Categories vs U.S.

Economy

4 of 6 metrics better than U.S. benchmarks

Median household income

$103.7K

U.S.

$81K

Median home value

$290.2K

U.S.

$333K

Poverty rate

5.1%

U.S.

12.4%

Housing stress

Rent-burdened renters (≥30%)

48.2%

U.S.

51.1%

Severely rent-burdened (≥50%)

19.6%

U.S.

25.9%

Affordability Ratios

Rent-to-Income

11.6%

Below 30% threshold

Home-Value-to-Income

2.8×

Within typical 3-5x range

Income distribution

Share of households by income bracket (ACS).

< $50k
21.9%
$50–100k
26.3%
$100–200k
35.0%
$200k+
16.8%
See St. Louis metro economy →See IL state economy →

Health

5 of 6 available metrics better than U.S.

Obesity

35.5%

U.S.

33.2%

Diabetes

10.1%

U.S.

12.1%

Current smoking

11.3%

U.S.

12.8%

See St. Louis metro health data →See IL state health data →

Connectivity

3 of 3 metrics better than U.S.

Best available speed

1,000Mbps

Gigabit speeds reported

100+ Mbps coverage

88.2%

U.S.

85.3%

Gigabit ready

30.6%

U.S.

8.6%

5G available

89.3%

U.S.

77.4%

See St. Louis metro connectivity →See IL state connectivity →

Map

Monroe County, IL

Population

35.4K

Area

385.3 sq mi

Density

91.9/sq mi

Neighbors

Randolph County, ILSt. Clair County, ILJefferson County, MOSte. Genevieve County, MOSt. Louis County, MO
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.