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Castalia, IA
City in Winneshiek County, Iowa.
Population
142
Land area
0.6sq mi
People per sq mi
246
ZIP codes
0
Castalia and its ZIP codes
Castalia at a glance
- Castalia is about 4.3 times as dense as Iowa as a whole.
Economy and federal money
Jobs, pay, income and spending are for Winneshiek County. PPP loans are for Castalia.
Unemployment rate
2.5%
Aug 2026, -0.1 pts in a year
Average annual pay
$53,710
10,515 jobs, 2025
Income per person
$66,544
BEA, 2024
Federal spending
$159M
FY 2026, $7,909 per person
Environment and hazard risk
Castalia, IA, from FEMA, NOAA and EPA
Natural hazard risk
Very Low
Top: hail
Storm events since 1996
562
Countywide, mostly hail
Flood insurance policies
60
0.6% of homes, county
July high / Jan low
83° / 7°F
38.9 inches of rain a year
Health statistics
Share of adults in Castalia, IA, CDC PLACES estimates
Obesity
35.9%
U.S. 33.3% +2.6 pts
Diabetes
11.9%
U.S. 12.1% about the same
Smoking
13.3%
U.S. 12.8% +0.5 pts
Uninsured (18-64)
7.1%
U.S. 11.1% -4.0 pts
Cities near Castalia
| Name | Distance | Land area (sq mi) |
|---|---|---|
| OssianCity | 5 mi | 1.1 |
| PostvilleCity | 5.7 mi | 2.1 |
| ClermontCity | 7.9 mi | 1.3 |
| CalmarCity | 11 mi | 1.1 |
| ElginCity | 11 mi | 0.7 |
| LuanaCity | 12 mi | 1.1 |
| West UnionCity | 13 mi | 2.7 |
| Fort AtkinsonCity | 13 mi | 0.3 |
| St. LucasCity | 13 mi | 0.3 |
| DecorahCity | 14 mi | 7.2 |
| WaukonCity | 15 mi | 2.8 |
| MononaCity | 15 mi | 1.4 |
| SpillvilleCity | 15 mi | 0.4 |
| HawkeyeCity | 18 mi | 0.7 |
| WaucomaCity | 18 mi | 0.5 |
| Jackson JunctionCity | 19 mi | 6 |
Frequently asked questions
- What county is Castalia, IA in?
- Castalia is in Winneshiek County, Iowa.
- What is the population of Castalia, IA?
- About 142 people live in Castalia, based on American Community Survey 5-year estimates.
- What cities are near Castalia?
- Nearby places include Ossian (5 mi), Postville (5.7 mi), Clermont (7.9 mi), Calmar (11 mi), Elgin (11 mi).
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023