Johnstown, Colorado
20 topographic sheets cover this place, the earliest surveyed in 1902 and the latest in 1982. It stands in the Johnstown-Milliken census division. It lies in ZIP code area 80534. The Survey maps it on the Johnstown quadrangle. 17,303 people lived here at the 2020 count. It stands 4,852 feet above sea level.
On record in Johnstown
Buildings and businesses the archive holds for this place. Each opens its own page, with the source record it came from.
On the National Register 3 records
Anderson Barnlisted 2004
Jared L. Brush Barnlisted 1991
Harvey J. Parish Houselisted 2000
Population over time
2 figuresJohnstown grew from 9,887 to 17,303 between 2010 and 2020. These are the recorded population figures Wikidata holds for this place, reached through the Geographic Names Information System number this page is keyed on rather than by name, so they belong to this place and not to another of the same name. Most are census counts, but not all are: an early figure may be a founding or settlement estimate, and an estimate published within five years of a census is left out. The change column is computed, and is left blank where more than 20 years separate a figure from the one before it, because a gap that long is not a change between two counts.
| Year | People | Change |
|---|---|---|
| 2010 | 9,887 | |
| 2020 | 17,303 | +7,416 (+75%) |
Topographic sheets covering this place
10 surveys from 20 printed sheetsMatched by testing this settlement's coordinate against the published boundary of every sheet in the United States Geological Survey's historical collection. Each opens the scanned sheet at the Survey.
- 1902 USGS Greeley quadrangle1:125000, 4 printings
- 1950 USGS Johnstown quadrangle1:24000, 5 printings
- 1951 USGS Johnstown quadrangle1:24000, 2 printings
- 1954 USGS Greeley quadrangle1:250000, 3 printings
- 1957 USGS Greeley quadrangle1:250000
- 1958 USGS Greeley quadrangle1:250000
- 1961 USGS Greeley quadrangle1:250000
- 1964 USGS Greeley quadrangle1:250000
- 1965 USGS Greeley quadrangle1:250000
- 1982 USGS Greeley quadrangle1:100000
Fires near this place
228 since 2010Regional context, not property-specific evidence. The federal wildfire occurrence database lists 228 fires within 5 miles of Johnstown between 2010 and 2020, burning about 216 acres in total. None started naturally. 6 were recorded as arson. Distance is straight-line from the map coordinates, so a fire counted here may appear on a neighbouring settlement's page as well.
| Reported cause | Fires |
|---|---|
| Missing data/not specified/undetermined | 192 |
| Debris and open burning | 10 |
| Equipment and vehicle use | 7 |
| Arson/incendiarism | 6 |
| Recreation and ceremony | 4 |
| Railroad operations and maintenance | 3 |
| Smoking | 3 |
| Power generation/transmission/distribution | 2 |
| Fireworks | 1 |
The most recent of them, most recent first, with the day each was reported and the service that recorded it.
| Date | Cause | Size | Reported by | Name on the report |
|---|---|---|---|---|
| 6 September 2016 | Missing data/not specified/undetermined | under an acre | Berthoud Fire Protection District | UNKNOWN |
| 5 September 2013 | Missing data/not specified/undetermined | under an acre | Milliken Fire Department | UNKNOWN |
| 3 September 2018 | Missing data/not specified/undetermined | under an acre | Weld County | UNKNOWN |
| 3 September 2017 | Missing data/not specified/undetermined | under an acre | Weld County | UNKNOWN |
| 23 September 2013 | Missing data/not specified/undetermined | under an acre | Milliken Fire Department | UNKNOWN |
| 21 September 2015 | Missing data/not specified/undetermined | under an acre | Big Thompson Canyon Volunteer Fire Department | UNKNOWN |
| 21 September 2013 | Missing data/not specified/undetermined | under an acre | Milliken Fire Department | UNKNOWN |
| 20 September 2018 | Missing data/not specified/undetermined | under an acre | Weld County | UNKNOWN |
Settlements close enough to share some of these fires:
Mines and quarries near this place
1 within 5 milesRegional context, not property-specific evidence. The federal mineral resources record lists 1 working within 5 miles of Johnstown: 1 occurrence. None of them still produces. What was taken out: Fire Clay (Refractory). Distance is straight-line from the map coordinates, so a quarry counted here may appear on a neighbouring settlement's page as well.
| Where | Site | Commodity | Status | Recorded |
|---|---|---|---|---|
| Unknown | Fire Clay (Refractory) | Occurrence |
Storms near this place
40 since 2002Regional context, not property-specific evidence. The National Weather Service names Johnstown in 40 storm reports between 2002 and 2025: 31 hail, 3 tornado, 3 thunderstorm wind, 2 flash flood. No death or injury is recorded in these reports. Each account below is quoted exactly as the forecast office filed it, from the NOAA Storm Events Database, and each date opens the federal record of that event.
| When | Event | Place named | Harm | What the report says |
|---|---|---|---|---|
| June 2015 | Flash Flood | Johnstown | $15,000 | Flash flooding forced numerous road closures in and around Milliken and Platteville. Water, up to 3 ft deep, was observed at Division Rd and State Highway 66. State Highway 60 and Forest Rd were also closed due to floodwaters. |
| May 2009 | Flash Flood | Johnstown | $5,000 | no account filed |
| July 2009 | Hail | Johnstown | $1,000 | Large hail broke a skylight. |
| August 2025 | Flood | Johnstown | - | Minor street flooding at CO-60 and Harriett Avenue in Milliken, relayed via NWSChat. |
| June 2025 | Hail | Johnstown | - | Report from mping. |
| June 2025 | Hail | Johnstown | - | Report from mping. |
| June 2025 | Hail | Johnstown | - | Report from mping. |
| June 2025 | Hail | Johnstown | - | Picture from Social Media with a few larger stones as well. |
| June 2025 | Hail | Johnstown | - | Report from mping. |
| May 2025 | Hail | Johnstown | - | Report from Mping. |
| July 2025 | Hail | Johnstown | - | Average size of the hailstones was 0.5 inches and the duration lasted 12 minutes. |
| July 2024 | Hail | Johnstown | - | Reported via mPing. |
| May 2023 | Thunderstorm Wind | Johnstown | - | A microburst wind flipped over a carport. |
| May 2023 | Thunderstorm Wind | Johnstown | - | Intense thunderstorm winds blew down a large portion of a tree which partially blocked a nearby street. |
| August 2023 | Thunderstorm Wind | Johnstown | - | Intense straight-line winds uprooted two trees. In addition, a nearby corn field was also flattened west of the location. |
| September 2019 | Hail | Johnstown | - | The hail shredded leaves, dented a car and damaged shingles. |
| August 2013 | Tornado (EF0) | Johnstown | - | A tornado touched down briefly in an open field. No damage was reported. |
| June 2005 | Hail | Johnstown | - | Beet fields in the area were damaged. |
| March 2004 | Tornado (F0) | Johnstown | - | A tornado touched down briefly but did no damage. |
| October 2004 | Tornado (F1) | Johnstown | - | A small tornado touched down a turned some empty fertilizer tanks on their sides at a fertilizer plant. Three storage sheds were also destroyed. The twister also damaged a trailer. |
| June 2025 | Hail | Johnstown | - | no account filed |
| May 2024 | Hail | Johnstown | - | no account filed |
| May 2024 | Hail | Johnstown | - | no account filed |
| June 2023 | Hail | Johnstown | - | no account filed |
| June 2021 | Hail | Johnstown | - | no account filed |
| June 2021 | Hail | Johnstown | - | no account filed |
| June 2021 | Hail | Johnstown | - | no account filed |
| September 2019 | Hail | Johnstown | - | no account filed |
| May 2017 | Hail | Johnstown | - | no account filed |
| June 2009 | Hail | Johnstown | - | no account filed |
| May 2009 | Hail | Johnstown | - | no account filed |
| June 2009 | Hail | Johnstown | - | no account filed |
| May 2005 | Hail | Johnstown | - | no account filed |
| May 2005 | Hail | Johnstown | - | no account filed |
| May 2005 | Hail | Johnstown | - | no account filed |
| August 2004 | Hail | Johnstown | - | no account filed |
| August 2004 | Hail | Johnstown | - | no account filed |
| August 2004 | Hail | Johnstown | - | no account filed |
| August 2004 | Hail | Johnstown | - | no account filed |
| July 2002 | Hail | Johnstown | - | no account filed |
Nearest settlements
The eight closest, with where each one stands in the county. Distances are straight-line, computed from the Geographic Names Information System coordinates.
Elsewhere
Matched on this settlement's Geographic Names Information System number rather than its name, so it cannot be a different place of the same name in another state.
| Wikipedia article on Johnstown | An encyclopaedic summary. Its text is share-alike, so it is linked here rather than copied. |
| Wikidata item Q2002961 | The structured record the population and elevation above come from. Public domain (CC0). |
Provenance
This settlement is recorded in the Geographic Names Information System as feature 180701. The sheet list is computed by point-in-boundary test against the United States Geological Survey's historical topographic inventory. Both are works of the United States government and carry no copyright under 17 U.S.C. 105.
Wildfire. Short, Karen C. 2022. Spatial wildfire occurrence data for the United States, 1992-2020 [FPA_FOD_20221014]. 6th Edition. Fort Collins, CO: Forest Service Research Data Archive. https://doi.org/10.2737/RDS-2013-0009.6 Collected with United States Government funding and usable without additional permissions or fees.
Mines and quarries. USGS Mineral Resources Data System (MRDS) https://mrdata.usgs.gov/mrds/ A work of the United States government, no copyright under 17 U.S.C. 105.
Storms. NOAA National Centers for Environmental Information, Storm Events Database https://www.ncei.noaa.gov/stormevents/ A work of the United States government, no copyright under 17 U.S.C. 105. Narratives are quoted verbatim from the National Weather Service report and are not edited or summarised.









