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| City | Duncan |
| State | Iowa (IA) |
| County | Hancock |
| Country | United States of America |
| Timezone | Central Time (America/Chicago) |
| Latitude | 43.104683 |
| Longitude | -93.711327 |
| Population | 21 |
| Density | 20.2 /km² |
| Incorporated | N/A |
| ZIP Code(s) | 50423 |
| Area Code | 515 |
| County Seat | Garner |
| School District | Garner-Hayfield-Ventura Community School District |
Duncan is a locality in Hancock County, Iowa, United States. It is a small community with a population of 21. The population density is 20.2 people per km². Duncan is located at 43.1047°N, 93.7113°W. It observes the Central Time (America/Chicago) timezone. ZIP code: 50423.
Duncan lies low in the heart of Hancock County, where the land unfolds in broad, patient swells under a sky that can hold both the fierce blue of high summer and the bruised, bruised gray of an approaching storm. It lies 26.0 miles west of Mason City, IA (from Mason City, IA: bearing 263°T), and is situated 5.5 miles west of Garner. Fields of corn and soybeans stretch to the horizon, their green and gold a living quilt stitched by the relentless sun and the deep, rich earth. The air here carries the scent of turned soil and the distant hum of farm machinery, a steady pulse that underscores the quietude. Old farmhouses, their paint faded to the color of weathered bone, stand sentinel against the elements, their porches worn smooth by generations of weary feet. Even the trees, mostly sturdy oaks and maples, seem to bow slightly, their branches reaching towards the vast, open expanse that defines this place. The story of Duncan is written in the slow, deliberate growth of its agricultural roots. For decades, the land has yielded its bounty, supporting families and shaping a way of life that values hard work and resilience. The local economy, tethered to the cycles of planting and harvest, moves with a predictable cadence, punctuated by the chatter of neighbors at the general store and the shared laughter during summer potlucks. There are no grand monuments here, no bustling avenues, but there is a quiet dignity in the enduring structures and the familiar faces. The community itself is a small, tightly knit collection of homes and businesses, each playing its part in the ongoing narrative of this corner of Iowa. The twilight here is a special thing, a long, drawn-out affair where the light softens the sharp edges of the landscape and paints the western sky in hues of rose and lavender, a final, gentle benediction before the stars begin their silent vigil over Duncan.
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This page provides an embedded street and satellite map of Duncan, Iowa — switch between views using the small square in the bottom left-hand corner of the map. Coordinates: 43.104683, -93.711327. Live weather conditions are sourced directly from the National Weather Service, with current observations and a 7-day forecast also powered by Open-Meteo. Real-time local news and world news feeds keep the page current, while a Wikipedia summary or an editorially written description provides background on Duncan and Hancock County.
Detailed location data for Duncan includes the ZIP code (50423), telephone area code (515), county seat of Hancock County (Garner), and school district assignment (Garner-Hayfield-Ventura Community School District). These are among the most commonly searched location details for any US city or town.
Location data is drawn from the USGS Geographic Names Information System (GNIS) and cross-verified against 2020 US Census records by coordinate proximity — ensuring the correct Duncan is identified even where the name is shared across multiple counties or states. Population figures are sourced from the 2020 US Census.
| Page generated | July 2026 |
| Location data | SimpleMaps US Cities Database; coordinates matched to USGS GNIS definitive data |
| Wikipedia validation | Article content matched to USGS GNIS coordinates via Wikipedia geosearch API. Location verified by proximity — not name matching alone. |