Johnstown, Colorado

Johnstown population, 2020 to 2024

Johnstown added 3,272 residents from July 2020 to July 2024, a change of +18.8%. In the latest year it moved by +1,125. Among 79 Colorado places of 5,000 or more, that growth ranks 11th; the median place changed by +3.0%. The median place of 5,000+ in Colorado has 14,061 people, so Johnstown is 1.5 times that size.

Johnstown covers 15.58 square miles of land and 0.09 of water, for 1,325 people per square mile of land. The median Colorado place of 5,000+ has 1,848, so Johnstown is less dense than the typical town.

The 2 counties Johnstown spans

Johnstown crosses county lines. The Census county-part estimates split its 20,639 residents as follows; Weld County holds 72.7% of them. The shaded shapes are on the map above; dots mark the eight nearest places.

ZIP codes in Johnstown

1 ZIP Code Tabulation Area (ZCTA) overlaps Johnstown by at least 10% of the ZCTA's or the town's land: 80534. ZCTAs are Census approximations of USPS ZIP code delivery areas. The list comes from the 2020 ZCTA to place relationship file, so a town that annexed land after 2020 may reach into ZIP codes not listed here.

Where Johnstown is

The Census internal point of Johnstown is at 40.307200, -104.911200. Denver, the capital, is 39.5 miles S in a straight line. The nearest larger place is Evans, CO (22,394 people), 9.1 miles away. The nearest city of 100,000 or more is Greeley, CO, 10.5 miles away.

Daylight in Johnstown

At 40.31° N, Johnstown gets about 15 h 03 min of daylight around the June solstice and 9 h 18 min around the December solstice, a swing of 5 h 45 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Johnstown

The eight nearest incorporated places of 1,000+ in Colorado, measured between internal points. The closest is Milliken, 2.8 miles away, with 9,102 people.