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Colby, Kansas

City in Thomas County, Kansas · ZIP 67701

  • Thomas County
  • Census data · ACS 2019-2023
  • 3 public schools
  • 5,539 (2024 estimate)Population
  • 2,090Households
  • $66,731Median household income
  • $150,700Median home value
  • 3Public schools
  • 1ZIP codes

About Colby

This page shows only what has been published about Colby: Census facts with their sources first, then its businesses, jobs, events, people in public roles, housing and questions as they are added. Nothing here is written by the town government.

Town intelligenceOfficial sources, refreshed yearly

Population, 2000 to 2020+2.2%
5.3k5.4k5.5k5.6k2000: 5,45020002010: 5,38720102020: 5,57020205,4505,570
Population of Colby at each census
CensusPopulation
20005,450
20105,387
20205,570

As counted at each census, within the boundaries the area had then; the current estimate is in the glance card.

Sources: Census 2000 Summary File 1: total population, place level, state 20, retrieved November 14, 2026; Census 2010 Summary File 1: total population, place level, state 20, retrieved November 14, 2026; Census 2020 Redistricting Data (P.L. 94-171): total population, place level, state 20, retrieved November 14, 2026.

Household income in Colby
Under $50k37.6%
$50k to $100k33.3%
$100k to $150k16.2%
$150k to $200k6.2%
$200k and over6.6%

Median household income $66,731 · Share of households by income, American Community Survey 5-year 2019-2023, table S1901.

Source: American Community Survey 5-year subject table S1901 (household income) 2019–2023, place level, state 20, retrieved November 14, 2026.

Housing tenure in Colby
Owner occupied
1,455 units
Renter occupied
635 units
Vacancy rate
14.4%

Occupied housing units by tenure and the share of all units vacant, American Community Survey 5-year 2019-2023, table DP04.

Source: American Community Survey 5-year data profile 2019–2023, place level, state 20, retrieved November 14, 2026.

Colby compared with its county and state
Colby compared with its county and state, American Community Survey 2019-2023
MeasureColbyThomas CountyKansas
Population5,3897,9132,937,569
Median household income$66,731$73,575$72,639
Median age32.735.337.2
Median home value$150,700$165,900$203,400
Bachelor’s degree or higher29.9%30.2%35.2%
Foreign-born residents5.5%4.3%7.2%
Owner-occupied homes69.6%76.5%66.9%
Mean commute to work9.9 minutes11.4 minutes19.8 minutes

Source: American Community Survey 5-year data profile 2019–2023, place level, state 20, retrieved November 14, 2026.

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Schools

Public schools in Colby3
Public schools in Colby, NCES directory 2023–2024
SchoolTypeGradesDistrict
Colby ElemPublicPre-K–4Colby Public Schools
Colby Middle SchoolPublic5–8Colby Public Schools
Colby Senior HighPublic9–12Colby Public Schools

Open public schools in the NCES directory for 2023–2024, placed by their listed location; private schools are not in the source. Enrollment and ratings are not shown.

Sources: NCES Common Core of Data, public school directory 2023–2024, retrieved November 14, 2026; NCES EDGE public school geocodes 2024–2025, retrieved November 14, 2026.

Frequently asked about ColbyPromoted from questions people asked

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Nearby towns

Other towns in Thomas County

All towns in Thomas County