Louisville, Colorado

Louisville population, 2020 to 2024

Louisville lost 394 residents from July 2020 to July 2024, a change of -1.9%. In the latest year it moved by +277. Among 79 Colorado places of 5,000 or more, that growth ranks 69th; the median place changed by +3.0%. The median place of 5,000+ in Colorado has 14,061 people, so Louisville is 1.5 times that size.

Louisville covers 7.97 square miles of land and 0.11 of water, for 2,611 people per square mile of land. The median Colorado place of 5,000+ has 1,848, so Louisville is denser than the typical town.

What county Louisville is in

All of Louisville's residents live in Boulder County, which had 330,262 residents in 2024. Louisville holds 6.3% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Louisville

1 ZIP Code Tabulation Area (ZCTA) overlaps Louisville by at least 10% of the ZCTA's or the city's land: 80027. ZCTAs are Census approximations of USPS ZIP code delivery areas. The list comes from the 2020 ZCTA to place relationship file, so a city that annexed land after 2020 may reach into ZIP codes not listed here.

Where Louisville is

The Census internal point of Louisville is at 39.969600, -105.143300. Denver, the capital, is 18.0 miles SSE in a straight line. The nearest larger place is Lafayette, CO (30,587 people), 2.9 miles away. The nearest city of 100,000 or more is Boulder, CO, 6.8 miles away.

Daylight in Louisville

At 39.97° N, Louisville gets about 15 h 01 min of daylight around the June solstice and 9 h 20 min around the December solstice, a swing of 5 h 41 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Louisville

The eight nearest incorporated places of 1,000+ in Colorado, measured between internal points. The closest is Superior, 2.8 miles away, with 13,654 people.