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95305
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  3. ZIP Code 95305
California (CA)Tuolumne CountySonora209350

ZIP Code 95305 — Big Oak Flat, CA

Tuolumne County * Sonora metro

Compare

267

Population

12.4%

Poverty rate

What stands out

  • Poverty rate: 12.4%.

Categories vs U.S.

Economy

2 of 2 metrics better than U.S. benchmarks

Per-capita income

$54.7K

U.S.

$45K

Housing stress

Income distribution

Share of households by income bracket (ACS).

Income distribution
Income bracketShare of households
< $50k58.6%
$50–100k41.4%
$100–200k0.0%
$200k+0.0%
< $50k
58.6%
$50–100k
41.4%
$100–200k
0.0%
$200k+
0.0%

Housing tenure

Owner-occupied vs renter-occupied housing (ACS).

Housing tenure
TenurePercent
Owners48.3%
Renters51.7%
48.3%
Owners
Owners
48.3%
Renters
51.7%

Health

4 of 6 available metrics better than U.S.

CDC PLACES modeled ZCTA-level estimates (adult prevalence).

Obesity

29.9%

U.S.

33.3%

Diabetes

11.4%

U.S.

12.0%

Current smoking

13.5%

U.S.

13.1%

Connectivity

0 of 3 metrics better than U.S.

100+ Mbps coverage

81.8%

U.S.

89.6%

Gigabit ready

1.1%

U.S.

46.1%

5G available

56.7%

U.S.

77.4%

Learning

Education metrics come from ACS 5-year estimates for ZIP Code Tabulation Areas (ZCTAs).

Bachelor's degree+ (age 25+)

6.8%

U.S.

35.7%

ZIP-level estimates can have higher margins of error than county/state totals; treat small differences as noise.

School districts

Big Oak Flat-Groveland Unified School District

Map

ZIP 95305

Big Oak Flat, CA

Population

267

Area

58.3 sq mi

Density

4.6/sq mi

Neighbors

953099531195321953279532995370

National Percentile Rankings

How this ZIP compares to other ZIP codes nationwide.

More Details

Census Tracts

4 tracts overlap this ZIP. Hover over segments to explore.

44%
29%
16%
10%

Tract 52.01

44.4%

Tract 42.01

29.1%

Tract 42.02

16.1%

Tract 51.01

10.4%

Total tracts: 4Coverage: 100.0%

Congressional District Overlap

District Coverage

ZIP codes can span multiple congressional districts. Overlap percentages are approximate by land area and should be treated as geographic coverage, not address-level assignment.

100%

CA-5

100%

Districts: 1Coverage: 100.0%

Data freshness

ACS 5-Year
2020–2024
CDC PLACES
2025
Broadband
2024-06-arcgis
Mobile
2025-11-24
Page Updated
2026-04-26

Release schedule and upstream dates: Sources.

Data sources

US Census Bureau (ACS 5-year)HUD USPS ZIP crosswalkUS Census TIGER/Line (geometry inputs)US Census TIGER/Line (school districts)US Census Bureau (ZCTA-to-tract relationship, 2020)US Census Bureau (2020 ZCTA-to-congressional-district relationship file, CD119)CDC PLACES (ZCTA)FCC Broadband Data Collection (fixed broadband)FCC (Mobile Broadband Data Collection)

Derived statistics

  • ZIP pages use Census ZIP Code Tabulation Areas (ZCTAs), not USPS delivery routes.
  • Population density is computed as population ÷ land area.
  • Overlap percentages (tracts and districts) are derived from map geometry and are approximate.

Data accuracy & methodology

ZIP pages combine 2020–2024 ACS 5-year ZCTA estimates with other public datasets when available (see Sources). Connectivity metrics use FCC coverage data, not ACS. ZIP-level estimates can have higher margins of error than county/state totals; treat small differences as statistical noise rather than precise changes.

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