BlockBefore

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.

Johnstown within Weld County

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

Population over time

2 figures

Johnstown 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.

YearPeople Change
20109,887
202017,303+7,416 (+75%)

Topographic sheets covering this place

10 surveys from 20 printed sheets

Matched 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.

Fires near this place

228 since 2010

Regional 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/undetermined192
Debris and open burning10
Equipment and vehicle use7
Arson/incendiarism6
Recreation and ceremony4
Railroad operations and maintenance3
Smoking3
Power generation/transmission/distribution2
Fireworks1

The most recent of them, most recent first, with the day each was reported and the service that recorded it.

DateCause SizeReported by Name on the report
6 September 2016Missing data/not specified/undeterminedunder an acreBerthoud Fire Protection DistrictUNKNOWN
5 September 2013Missing data/not specified/undeterminedunder an acreMilliken Fire DepartmentUNKNOWN
3 September 2018Missing data/not specified/undeterminedunder an acreWeld CountyUNKNOWN
3 September 2017Missing data/not specified/undeterminedunder an acreWeld CountyUNKNOWN
23 September 2013Missing data/not specified/undeterminedunder an acreMilliken Fire DepartmentUNKNOWN
21 September 2015Missing data/not specified/undeterminedunder an acreBig Thompson Canyon Volunteer Fire DepartmentUNKNOWN
21 September 2013Missing data/not specified/undeterminedunder an acreMilliken Fire DepartmentUNKNOWN
20 September 2018Missing data/not specified/undeterminedunder an acreWeld CountyUNKNOWN

Settlements close enough to share some of these fires:

Every fire recorded in Weld County

Mines and quarries near this place

1 within 5 miles

Regional 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 SiteCommodity StatusRecorded
UnknownFire Clay (Refractory)Occurrence

Every working recorded in Weld County

Storms near this place

40 since 2002

Regional 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.

WhenEvent Place namedHarm What the report says
June 2015Flash FloodJohnstown$15,000Flash 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 2009Flash FloodJohnstown$5,000no account filed
July 2009HailJohnstown$1,000Large hail broke a skylight.
August 2025FloodJohnstown-Minor street flooding at CO-60 and Harriett Avenue in Milliken, relayed via NWSChat.
June 2025HailJohnstown-Report from mping.
June 2025HailJohnstown-Report from mping.
June 2025HailJohnstown-Report from mping.
June 2025HailJohnstown-Picture from Social Media with a few larger stones as well.
June 2025HailJohnstown-Report from mping.
May 2025HailJohnstown-Report from Mping.
July 2025HailJohnstown-Average size of the hailstones was 0.5 inches and the duration lasted 12 minutes.
July 2024HailJohnstown-Reported via mPing.
May 2023Thunderstorm WindJohnstown-A microburst wind flipped over a carport.
May 2023Thunderstorm WindJohnstown-Intense thunderstorm winds blew down a large portion of a tree which partially blocked a nearby street.
August 2023Thunderstorm WindJohnstown-Intense straight-line winds uprooted two trees. In addition, a nearby corn field was also flattened west of the location.
September 2019HailJohnstown-The hail shredded leaves, dented a car and damaged shingles.
August 2013Tornado (EF0)Johnstown-A tornado touched down briefly in an open field. No damage was reported.
June 2005HailJohnstown-Beet fields in the area were damaged.
March 2004Tornado (F0)Johnstown-A tornado touched down briefly but did no damage.
October 2004Tornado (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 2025HailJohnstown-no account filed
May 2024HailJohnstown-no account filed
May 2024HailJohnstown-no account filed
June 2023HailJohnstown-no account filed
June 2021HailJohnstown-no account filed
June 2021HailJohnstown-no account filed
June 2021HailJohnstown-no account filed
September 2019HailJohnstown-no account filed
May 2017HailJohnstown-no account filed
June 2009HailJohnstown-no account filed
May 2009HailJohnstown-no account filed
June 2009HailJohnstown-no account filed
May 2005HailJohnstown-no account filed
May 2005HailJohnstown-no account filed
May 2005HailJohnstown-no account filed
August 2004HailJohnstown-no account filed
August 2004HailJohnstown-no account filed
August 2004HailJohnstown-no account filed
August 2004HailJohnstown-no account filed
July 2002HailJohnstown-no account filed

Every storm recorded in Weld County

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.

Map PlaceDistance Sheets
Clark0.9 miles20
Elwell1.6 miles20
Hardman2.0 miles20
Pulliam2.0 miles20
Hillsboro2.5 miles20
Milliken3.1 miles20
Bunyan3.2 miles20
Buda3.5 miles20

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 JohnstownAn encyclopaedic summary. Its text is share-alike, so it is linked here rather than copied.
Wikidata item Q2002961The 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.