Seneca, KS · standard
ZIP Code 66538
Nemaha County, Kansas - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 3,264
- 9/sq mi Low-density area
- $78,981
- Median income Near-median income area
- $299,300
- Median home value Above-median home value
- 32.9%
- Bachelor's or higher Above-average bachelor's attainment
National ZIP placement
Seneca pairs an above-median household income with above-median home values, in a rural, homeowner-dominated area.
- Top 39%
- household income, US ZIPs
- Top 34%
- home value, US ZIPs
- 9
- people per sq mi
- 81%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 66538 against every reporting US ZIP.
ZIP code 66538 covers 379.5 square miles in Seneca, Nemaha County, Kansas (a standard USPS delivery area), with a modest 3,264 residents on file, a density of 9 people per square mile, in the Chicago time zone.
ZIP 66538 lands in the middle-income range, with a median household income of $78,981 (10% above the average Kansas ZIP), while per-capita income is $39,890. The poverty rate is 8.2%, with unemployment at 2.0%; those measures add context to the income figure. Housing is both higher-cost and owner-heavy: median home value is $299,300 (85% above the average Kansas ZIP), while 81.0% of occupied homes are owner-occupied and median rent is $808.
A solid share of residents have a four-year degree: 32.9% of adults hold a bachelor's degree or higher, the median age is 41.3, and the average commute is -. The page also surfaces 3 ZIP codes within roughly 10 miles and 6 more in Nemaha County, so 66538 can be compared with both its immediate and county-level context.
Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →
Top industries in ZIP 66538
Top 5 sectors by establishment count in Seneca, KS
Which industries have the most business establishments in ZIP 66538.
- Retail trade
Retail trade
22 establishments
- Construction
Construction
21 establishments
- Health care and social assistance
Health care and social assistance
21 establishments
- Wholesale trade
Wholesale trade
17 establishments
- Other services (except public administration)
Other services (except public administration)
16 establishments
What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.
Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 66538, Seneca, KS · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.
Quick Facts
3,264
Population
379.5
Area (sq mi)
9
People / sq mi
Chicago
Time Zone
standard
ZIP Type
Who lives in ZIP 66538?
41.3
Median Age
53.4%
Male
46.6%
Female
1.4%
Foreign-Born
Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How much do residents earn?
$78,981
Median Household Income
+10% vs state ZIP avg
$39,890
Per Capita Income
8.2%
Poverty Rate
2.0%
Unemployment Rate
How ZIP 66538 ranks among Kansas ZIPs
Seneca, KS household income vs. every Kansas ZIP code
Median household income among 659 reporting Kansas ZIPs (this ZIP's population is too small for a reliable national-corpus placement)
$78,981 Top 28% higher than 72% of 659 Kansas ZIPs
Each bar is a $20K-wide band; taller bars hold more Kansas ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What is the education profile here?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
Housing stock: occupied vs vacant
1,509housing units
1,509
Total Housing Units
1,361
Occupied Units
148
Vacant Units
2.54
Avg Household Size
Occupancy Type
$299,300
Median Home Value
+85% vs state ZIP avg
$808
Median Rent
1980
Median Year Built
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What businesses operate in this ZIP?
Census Bureau data shows 176 business establishments in ZIP 66538, employing approximately 2,352 people with a combined annual payroll of $115,104,000.
176
Businesses
2,352
Employees
$115.1M
Annual Payroll
14
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Retail trade | 22 | 12.5% |
| Construction | 21 | 11.9% |
| Health care and social assistance | 21 | 11.9% |
| Wholesale trade | 17 | 9.7% |
| Other services (except public administration) | 16 | 9.1% |
| Professional, scientific, and technical services | 13 | 7.4% |
| Finance and insurance | 12 | 6.8% |
| Transportation and warehousing | 11 | 6.3% |
| Accommodation and food services | 10 | 5.7% |
| Manufacturing | 9 | 5.1% |
| Administrative and support and waste management and remediation services | 6 | 3.4% |
| Information | 4 | 2.3% |
| Agriculture, forestry, fishing and hunting | 3 | 1.7% |
| Educational services | 3 | 1.7% |
Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.
Nearby ZIP Codes
Want a side-by-side? Compare 66538 vs 66522 →
ZIP 66538 vs its nearest neighbors, by population
Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 66538
Seneca (66538)
3,264 residents
- 66404 530
Baileyville (66404)
530 residents
- 66408 434
Bern (66408)
434 residents
- 66522 49
Oneida (66522)
49 residents
What this shows Among its immediate neighbors, ZIP 66538 ranks the most populous - useful context the national average alone can't give.
ZIP 66538 vs its nearest neighbors, by median income
Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 66408
Bern (66408)
$91,250 median income
- 66404
Baileyville (66404)
$89,620 median income
- 66538
Seneca (66538)
$78,981 median income
- 66522
Oneida (66522)
$57,500 median income
What this shows By household income, ZIP 66538 ranks #3 of 4 neighboring ZIPs, local affluence varies block to block, not just metro to metro.
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 66538, both outside KS so the neighborhoods are not geographic containment (Nearby and same-county blocks stay local).
Similar population
Nearest cross-state ZIPs by resident population (3,264 here; floor ≥1,000).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in Nemaha County
Related Areas
Frequently Asked Questions
What county is ZIP code 66538 in?
ZIP code 66538 (Seneca) is located in Nemaha County, Kansas. Nemaha County contains multiple ZIP codes, see the full list at /counties/nemaha-ks.
What is the population of ZIP code 66538?
ZIP code 66538 in Seneca, KS has a population of 3,264 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 66538?
The median household income in ZIP 66538 is $78,981, which is 4% above the national average of $76,288.
What is the average home value in ZIP 66538?
The median home value in ZIP 66538 is $299,300, which is 8% above the national average of $278,155.
What is the demographic makeup of ZIP 66538?
The largest racial group in ZIP 66538 is White at 98.2%. Hispanic or Latino residents make up 2.0% of the population.
How many businesses are in ZIP code 66538?
ZIP code 66538 has 176 business establishments employing approximately 2,352 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 66538?
The top industries by establishment count in ZIP 66538 are: Retail trade (22), Construction (21), Health care and social assistance (21). There are 14 industry sectors represented in total.
What is the education level in ZIP code 66538?
In ZIP code 66538, 68.4% of residents aged 25+ have a high school diploma or higher, and 32.9% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What percentage of residents own vs. rent in ZIP 66538?
In ZIP code 66538, approximately 81.0% of occupied housing units are owner-occupied and 19.0% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 66538?
The poverty rate in ZIP code 66538 is 8.2% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.
Related
Take this with you
What to do with ZIP 66538's numbers, next.
- See how ZIP 66538 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Seneca, KS ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
- Save this ZIP to your shortlist to track alongside others you're considering View your shortlist
ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.