Greencastle township, Iowa
Greencastle township profile, demographic data, and geographic information.
Greencastle township is a geographic entity located in Marshall County, Iowa. As of official census estimates, it has a reported population of 1,123. The land area covers 36.31 sq mi. [1]
Demographics & Population
| Demographic Metric | Estimate / Count | Margin of Error | Survey Period / Source |
|---|---|---|---|
| Total Population | 1,123 | ±238 | 2020-2024 / Census ACS 5-Year 2024 |
| Median Age | 41.1 yrs | ±8.7 | 2020-2024 / Census ACS 5-Year 2024 |
| Total Households | 464 | ±111 | 2020-2024 / Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).
Housing & Real Estate Profile
| Housing Metric | Estimate / Value | Margin of Error |
|---|---|---|
| Total Housing Units | 507 | ±114 |
| Occupied Housing Units | 464 | ±111 |
| Vacant Housing Units | 43 | ±33 |
| Median Home Value | $108,800 | ±$18,646 |
| Median Gross Rent | $697 | ±$165 |
Source: U.S. Census Bureau ACS 5-Year (2020-2024).
Economy & Workforce
| Economic Metric | Estimate / Value | Margin of Error |
|---|---|---|
| Median Household Income | $99,828 | ±$13,285 |
| Per Capita Income | $38,508 | ±$7,255 |
| Poverty Rate | 7.7% | ±3.7% |
| Population Below Poverty Level | 86 | ±45 |
| Unemployment Rate | 4% | ±4.9% |
| Civilian Labor Force, Employed | 552 | ±165 |
| Broadband Internet Rate | 95% | ±5.9% |
Source: U.S. Census Bureau ACS 5-Year (2020-2024).
Local Government & Public Administration
Authoritative general-purpose local government units serving this area
U.S. Census Bureau GUS (2026) / GMAF
| Government Unit | Unit Type | Jurisdiction Role | Contact / Address |
|---|---|---|---|
|
GUS Population: 40,392 (2024)
ID: 126550
|
County | Official County Government |
Contact: CHAIRMAN
1 E MAIN ST, STE 6, MARSHALLTOWN IA 50158-4977
|
Education
Listing 10 local institutions (NCES 2024-2025)
External reference via K12Guides
| Institution | Type | Grades | Location |
|---|---|---|---|
| Regular School Nearby | PK-04 | Marshalltown, IA | |
| Regular School Nearby | 07-08 | Marshalltown, IA | |
| Regular School Nearby | KG-02 | Grinnell, IA | |
| Regular School Nearby | 05-08 | Newton, IA | |
| Regular School Nearby | 03-04 | Grinnell, IA | |
| Regular School Nearby | PK-05 | Laurel, IA | |
| Regular School Nearby | 06-08 | Gilman, IA | |
| Regular School Nearby | 09-12 | Le Grand, IA | |
| Regular School Nearby | KG-04 | Newton, IA | |
| Regular School Nearby | PK-02 | Grinnell, IA |
Source: k12guides.com.
Community Facilities & Infrastructure
Displaying 10 civic institutions across 2 datasets queried
CMS • IPEDS • IMLS
| Facility Name | Category | Relationship | Address / Location | Contact |
|---|---|---|---|---|
|
Marshalltown Community College
|
College | 8.8 mi away | 3700 S Center St, Marshalltown, IA, 50158 |
6417527106
|
|
GILMAN PUBLIC LIBRARY
|
Library | 1.7 mi away | 106 N MAIN, GILMAN, IA, 50106 |
(641) 498-2120
|
|
Grinnell College
|
College | 11.2 mi away | 1121 Park Street, Grinnell, IA, 50112-1690 |
6412694000
|
|
LAUREL COMMUNITY LIBRARY
|
Library | 5.7 mi away | 102 N MAIN ST, LAUREL, IA, 50141 |
(641) 476-3045
|
|
PIONEER HERITAGE LIBRARY
|
Library | 8.0 mi away | 204 N VINE ST, LE GRAND, IA, 50142 |
(641) 479-2122
|
|
DRAKE COMMUNITY LIBRARY
|
Library | 11.5 mi away | 930 PARK ST, GRINNELL, IA, 50112 |
(641) 236-2661
|
|
MARSHALLTOWN PUBLIC LIBRARY
|
Library | 11.6 mi away | 105 W BOONE ST, MARSHALLTOWN, IA, 50158 |
(641) 754-5738
|
|
LOUISE & LUCILE HINK/TAMA PUBLIC LIBRARY
|
Library | 12.9 mi away | 401 SIEGEL ST, TAMA, IA, 52339 |
(641) 484-4484
|
|
TOLEDO PUBLIC LIBRARY
|
Library | 14.0 mi away | 206 E HIGH ST, TOLEDO, IA, 52342 |
(641) 484-3362
|
|
MELBOURNE PUBLIC LIBRARY
|
Library | 15.2 mi away | 603 MAIN ST, MELBOURNE, IA, 50162 |
(641) 482-3115
|
Distances calculated from authoritative source coordinates. Source: CMS, IMLS, NCES IPEDS.
Climate & Weather Observations
NOAA Monthly Climate Normals
Observation Station: Climate data reflects NOAA 1991–2020 standard normals recorded at GRINNELL 3 SW, IA US, located 12.6 miles from Greencastle township. Local microclimates, topography, and elevation may cause municipal conditions to differ.
| Month | High (°F) | Low (°F) | Mean (°F) | Precip (in) | Snow (in) |
|---|---|---|---|---|---|
| January | 28.3° | 10.2° | 19.3° | 1.10" | 9.0" |
| February | 33.0° | 13.6° | 23.3° | 1.55" | 9.1" |
| March | 46.1° | 24.7° | 35.4° | 2.22" | 3.4" |
| April | 59.4° | 35.1° | 47.3° | 3.90" | 0.6" |
| May | 69.9° | 47.1° | 58.5° | 5.09" | 0.0" |
| June | 79.5° | 57.8° | 68.6° | 5.53" | 0.0" |
| July | 83.3° | 61.8° | 72.5° | 3.96" | 0.0" |
| August | 81.2° | 59.2° | 70.2° | 4.37" | 0.0" |
| September | 75.2° | 50.2° | 62.7° | 3.71" | 0.0" |
| October | 62.3° | 38.2° | 50.2° | 3.21" | 0.5" |
| November | 46.8° | 26.4° | 36.6° | 1.95" | 1.5" |
| December | 34.0° | 16.3° | 25.2° | 1.60" | 6.9" |
Source: NOAA U.S. Climate Normals (1991–2020).
Local Weather Forecast
Weather forecast data is currently unavailable in the local cache.
Nearby Cities & Communities
Listing adjacent communities by spatial proximity (miles)
Proximity discovery
| Community Name | Classification | Distance | Population |
|---|---|---|---|
| Gilman city | City | 1.7 mi | — |
| Ferguson city | City | 3.9 mi | — |
| Laurel city | City | 5.7 mi | — |
| Montour city | City | 7.7 mi | — |
| Le Grand city | City | 7.9 mi | — |
| Haverhill city | City | 8.3 mi | — |
Sources & Data Provenance
- Geographic Classification & Identifiers: U.S. Census Bureau Gazetteer (2026) and TIGER/Line Shapefiles. GEOID: 1912791749. • Official Source Dataset →
- Socioeconomic & Housing Metrics: U.S. Census Bureau American Community Survey (ACS) 5-year estimates and Population Estimates Program (PEP). Margin of Error (MOE) intervals are reported where published; suppressed values are never estimated or replaced with false zeros.
- Civic Directory Datasets: Centers for Medicare & Medicaid Services (CMS Hospital Directory), National Center for Education Statistics (NCES IPEDS Postsecondary Directory), and Institute of Museum and Library Services (IMLS Public Libraries Survey). Airport landing facilities are provided by airport-data.com.
- Weather & Climate Observations: National Oceanic and Atmospheric Administration (NOAA) U.S. Climate Normals 1991–2020 and National Weather Service (NWS) point forecasts.