Colby, Kansas

Colby population, 2020 to 2024

Colby lost 70 residents from July 2020 to July 2024, a change of -1.2%. In the latest year it moved by -36. Among 63 Kansas places of 5,000 or more, that growth ranks 48th; the median place changed by +0.4%. The median place of 5,000+ in Kansas has 11,560 people, so Colby is 48% of it.

Colby covers 3.68 square miles of land, for 1,505 people per square mile of land. The median Kansas place of 5,000+ has 1,527, so Colby is close to the typical town.

What county Colby is in

All of Colby's residents live in Thomas County, which had 7,802 residents in 2024. Colby holds 71.0% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Colby

1 ZIP Code Tabulation Area (ZCTA) overlaps Colby by at least 10% of the ZCTA's or the city's land: 67701. 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 Colby is

The Census internal point of Colby is at 39.384600, -101.045000. Topeka, the capital, is 288.2 miles E in a straight line. The nearest larger place is McCook, NE (7,212 people), 61.0 miles away. The nearest city of 100,000 or more is Aurora, CO, 197.1 miles away.

Daylight in Colby

At 39.38° N, Colby gets about 14 h 57 min of daylight around the June solstice and 9 h 23 min around the December solstice, a swing of 5 h 34 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Colby

The eight nearest incorporated places of 1,000+ in Kansas, measured between internal points. The closest is Oakley, 21.0 miles away, with 1,996 people.