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History · Colo

Colo’s post office opened in 1864, and 46% of its homes were built before 1940

Below: maps from 1975 on and the census since 1870.

1864first post office
0on the National Register
46%homes built before 1940
1famous people
Photo: Chipchicken · CC BY-SA 4.0
Quick answers

How Colo began

When was Colo founded?

1864

The Colo post office opened in 1864, the earliest record of the town by name. Wikidata gives 1876.

First census: 226 in 18702020 census: 845162 years
Founding year: the first Colo post office (Blevins & Helbock, CC0). Wikidata: 1876.The full story ↓

What stands out about Colo’s past

Read from the archive, the National Register and the record. The page puts what stands out first.

★ What stands out · Help out

Start Colo’s collection

The first neighbors to add old photos shape how Colo’s history is told.

Decades since 1900 with photos
00s10s20s30s40s50s60s70s80s90s
0 of 10 decades. The empty ones are waiting for someone’s album.
The story

How Colo came to be

From Wikipedia’s history of Colo.

Read it all →

Settlement of the area which would become Colo began in 1856 when the small village of New Albany was founded. By the early 1860s the railroad reached the area with the first train station in Story County being built in the community in 1863. Colo would be incorporated on April 26, 1876 and would take its name from the dog of railroad official John Blair. Reportedly Colo the dog succumbed to a grisly fate as it was crushed by a train that was carrying construction material. The community would see an influx of visitors in the 1920s and 1930s with the completion of

the Lincoln and Jefferson highways which intersect in Colo at the Reed/Niland Corner.

Text from Wikipedia, licensed CC BY-SA 4.0.

From the old history books

What they wrote about Colo in 1911

Passages that mention Colo, cut from the printed page as they were published.

Other towns which had owed their existence to the coming of the railroads were Colo and Ontario, Colo had an immediate importance as a depot of railroad supplies for a time, and its establishment had had the effect of destroying utterly the near-by village of New Albany which never had been a consi…
History of Story County, Iowa1911 · page 327Read the page →
Read the text

Other towns which had owed their existence to the coming of the railroads were Colo and Ontario, Colo had an immediate importance as a depot of railroad supplies for a time, and its establishment had had the effect of destroying utterly the near-by village of New Albany which never had been a considerable burg but which nevertheless had been known upon the map. Ontario was immediately adjacent to New Philadelphia, which village it geographically superseded. But Ontario never was able to succeed to the measure of general interest and importance which

Text read by machine from the scan; it may contain errors.
ing to the new country. But the statements are definite and, probably, to a large extent accurate. The extract relating to Story County is as follows : "Leaving State Center we immediately enter the county of Story and passing the small depot tow'n of Colo, reach Nevada the seat of justice of Story…
History of Story County, Iowa1911 · page 336Read the page →
Read the text

ing to the new country. But the statements are definite and, probably, to a large extent accurate. The extract relating to Story County is as follows : "Leaving State Center we immediately enter the county of Story and passing the small depot tow'n of Colo, reach Nevada the seat of justice of Story county, a pleasant prairie town of from ten to twelve hundred people. The county was organized in 1854. and the first house was built in Nevada the same year. The town was doomed to many years of languishment and to those untoward vicissitudes incident to an inland point without the means

Text read by machine from the scan; it may contain errors.

Scans and text from the Internet Archive. Books published in 1930 or earlier, which are in the public domain.

Timeline

Colo, 1864 to 1975

Woven from the archive, old maps, post office records, the National Register and the people born here.

  1. 19th century
  2. 1864Post officeThe Colo post office opens
  3. 20th century
  4. 1916Born hereGlenn Olson is born here
  5. 1975On the mapFirst mapped by the U.S. Geological Survey
By decade

Colo, decade by decade

On the map

Colo on the map, 1975 to 1993

Every edition of the U.S. Geological Survey’s map of Colo. Tap a year, or press play to watch the town change.

Colo on the 1975 USGS mapColo on the 1985 USGS mapColo on the 1993 USGS map1975Colo sheet · 1:24,000

U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of Colo.

People over time

Colo, census by census

020040060080018801900192019401960198020002020Peak: 876

Between 226 and 876 people in every census since 1870.

16 censuses, 1870–2020.

U.S. Census Bureau decennial counts, from the census table on Colo’s Wikipedia page.

Questions about Colo’s history

What year was Colo founded?

The Colo post office opened in 1864, the earliest record of the town by name (U.S. post office records). Wikidata gives 1876.

Memory lane

What the archives can’t tell you, neighbors can.

Town Square →
Start a conversation
Sources

Where this page comes from

Founding dates: Wikidata, Wikipedia, the U.S. post office records of Blevins & Helbock (CC0) and the Census. Homes by year built: Census ACS 2020–24. National Register of Historic Places: National Park Service (list of May 22, 2026). Old photos, postcards and papers: Wikimedia Commons, the Library of Congress and other public archives, credited on each item’s page. Maps: U.S. Geological Survey historical topographic maps (via Esri) and Sanborn fire-insurance maps (Library of Congress). History text and census tables: Wikipedia (CC BY-SA 4.0). Places that used to be: USGS Geographic Names Information System (2021). How TownRatings grades history →

From Wikimedia Commons (7), Wikipedia, Wikidata and Wikipedia for famous people, U.S. Geological Survey historical maps, U.S. Census counts (via Wikipedia), the US Post Offices dataset (Blevins & Helbock), the USGS Geographic Names Information System and old county and town histories (Internet Archive). Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.