Trego County area

Trego County, Kansas covers 899.6 square miles: 889.5 square miles of land and 10.1 square miles of water. Its county seat is WaKeeney. An estimated 2,740 people lived there in 2025.

Official Census measurements · GEOID 201952026 Gazetteer · retrieved September 27, 2026
Land area889.5 mi²
Water area10.1 mi²
Population (2025)2,740
People per mi²3.1

County outline

Generalized outline of Trego County, Kansas
2025 Census cartographic boundary, fitted to this frame. County maps are not at a common scale. The 2026 area measurements below come from the separate Gazetteer release. Map source and limitations.

Where Trego County is located

Trego County highlighted on a map of all U.S. county equivalents. About the maps

Area breakdown

Land accounts for 98.9% of Trego County’s measured area and water for 1.1%. Its combined area converts to 2,330 square kilometers or approximately 575,758 acres.

Green: land · blue: water

MeasurementSquare milesSquare kilometersAcres
Land889.4742,303.727569,263.4
Water10.14826.2836,494.7
Total899.6222,330.01575,758.1

How Trego County compares

By original Census land area, Trego County ranks #34 of 105 in Kansas and #893 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.

Its land area is 1.219 times the Kansas county-equivalent median of 729.7 square miles. It accounts for 1.1% of the combined county land area in the state.

See the complete Kansas ranking · What counts as a county equivalent?

Population and density of Trego County

The Census Bureau estimates that 2,740 people lived in Trego County on July 1, 2025. That ranks #3,054 of 3,222 county equivalents nationally and #83 of 105 in Kansas. Since the April 1, 2020 estimates base of 2,811, the population has declined by 71 (−2.5%), compared with +1.3% for Kansas as a whole.

With 889.5 square miles of land, that is 3.1 people per square mile (1.2 per km²), placing Trego County #2,974 nationally for density and #88 in Kansas. The median county equivalent has 47 people per square mile; the Kansas median is 8.1. Put another way, there are about 208 acres of land per resident.

Estimated population, 2020–2025 · line scaled to this county’s own range
July 1202020212022202320242025
Estimate2,8092,7932,7572,7432,7362,740
Change—−16−36−14−7+4

U.S. Census Bureau, Vintage 2025 population estimates. Estimates are revised each year and are not decennial census counts. Density divides the whole population by the whole county’s land area, so it describes an average, not how settlement is distributed within the county. Population sources and methods.

Cities and towns in Trego County

2 incorporated places lie at least partly in Trego County. Together they are home to 1,837 people (67%); the other 903 (33%) live outside any incorporated place, in unincorporated communities and rural areas.

The largest is WaKeeney city, with 1,746 residents in the county.

Incorporated placePopulation 2025Since 2020Land mi²
WaKeeney cityCounty seat1,746−2.7%1.783
Collyer city91−4.2%0.234

Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each place inside Trego County. Land: 2026 Census Gazetteer, for the whole place even where it extends into other counties. How communities are listed.

Metropolitan area

Trego County is not part of any metropolitan or micropolitan statistical area in the Office of Management and Budget’s July 2023 delineation; 1,306 other county equivalents are also outside one. These areas are built around an urban core of at least 10,000 people plus the counties tied to it by commuting, so counties outside them are generally rural.

ZIP codes

8 ZIP Code Tabulation Areas have land in Trego County; 3 of them have most of their land inside the county, and the others mainly cover neighboring areas.

6752167572675846763167637676566765767672

ZIP Code Tabulation Areas are the Census Bureau’s approximations of USPS ZIP Code service areas, from the 2020 Census relationship files. Lighter codes have less than half of their land in this county. Post-office-box and single-address ZIP Codes have no tabulation area.

Counties bordering Trego County

Trego County shares a land border with 5 county equivalents. Each of them has more land than Trego County. The largest neighbor is Ness County (1,074.7 mi²) and the smallest is Rooks County (890.5 mi²). Together with its neighbors, Trego County forms a block of 5,724.9 mi² of land, of which it holds 15.5%.

Map of Trego County and the 5 county equivalents that border it Gove County, Kansas: 1,071.7 mi² landEllis County, Kansas: 899.9 mi² landNess County, Kansas: 1,074.7 mi² landGraham County, Kansas: 898.5 mi² landRooks County, Kansas: 890.5 mi² land
Trego County (dark) and its bordering county equivalents. Select a neighbor to open its profile. Drawn from the 2025 Census cartographic boundaries in an equal-area projection. How borders are determined.
Bordering county equivalentLand mi²Size vs. TregoCompare
Ness County1,074.71.2× largerCompare
Gove County1,071.71.2× largerCompare
Ellis County899.9about the sameCompare
Graham County898.5about the sameCompare
Rooks County890.5about the sameCompare

How big is Trego County compared with U.S. states?

Trego County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 1.2 times as much. Kansas’s county land could hold about 92 areas the size of Trego County.

Land area: Trego County and the closest-sized states
Trego County889.5 mi²
Rhode Island1,033.9 mi²

Another way to picture it: the same land area would fill a square about 29.8 miles (48 km) on each side. Real county shapes are rarely square, so this is a scale reference rather than a width or driving distance.

State figures are the sums of each state’s county-equivalent land measurements in the same Census release, so states and counties are compared on the same basis. Published state totals can differ slightly because of rounding. Compare all states · Counties bigger than entire states.

What stands out about Trego County?

Trego County has more land than 2,329 of the other 3,221 county equivalents in the dataset.

Land area compared with the typical county equivalent
Trego County889.5 mi²
Kansas median729.7 mi²
National median604.5 mi²

A median is the middle county-equivalent measurement, not the average of the largest and smallest. All three bars use the same linear scale. Very small areas may appear as a thin sliver; the labels retain their values.

Does including water change its rank?

Using land plus water places Trego County at #976 nationally by total area, 83 places farther from the top than its land rank. Other county equivalents gain more area when their water measurements are included.

Its water share is 1.1%, compared with a national county-equivalent median of 1.2%. The two percentages are within 0.1 percentage points of each other. This describes the statistical geography’s land/water mix, not flood exposure or developable land.

Closest positions in the national land ranking

These entries sit immediately beside Trego County in the national ranking. They can be in different states and are not necessarily geographic neighbors.

Land rankCounty equivalentLand mi²Comparison
#892Wibaux County, Montana889.6Compare
#893Trego County, Kansas889.5This county
#894Terry County, Texas888.9Compare

Calculated from the same Census release as the area table. Total-area order uses original ALAND + AWATER; water shares and chart labels use published square miles. Calculation details.

Representative coordinates

The Census internal point is 38.921302, -99.865423. It represents a location inside the geography; it is not necessarily the centroid or the address of a courthouse.

Source and precision

U.S. Census Bureau, 2026 Gazetteer Files, Counties. Original ALAND: 2,303,727,352 m²; AWATER: 26,281,953 m². Rankings use ALAND; exact ties use ascending GEOID. Tables preserve Census-published square miles to three decimals, with conversions based on those values.

Download the official county source ZIP ↗ · Methodology

Common questions

How big is Trego County?

Trego County, Kansas has 889.5 square miles (2,303.7 km²) of land and 10.1 square miles of water, for a total area of 899.6 square miles. It ranks #893 of 3,222 U.S. county equivalents by land area.

Is Trego County the largest county in Kansas?

No. Trego County ranks #34 of 105 in Kansas by land area. The largest is Butler County, with 1,429.7 square miles of land.

What counties border Trego County?

Trego County shares a land border with Gove County, Ellis County, Ness County, Graham County, and Rooks County.

What is the population of Trego County?

The Census Bureau estimates Trego County had 2,740 residents on July 1, 2025, ranking #3,054 of 3,222 county equivalents. That is 3.1 people per square mile of land.

What is the county seat of Trego County?

The county seat of Trego County is WaKeeney.

What cities and towns are in Trego County?

Trego County has 2 incorporated places. The most populous are WaKeeney city and Collyer city; 903 residents live outside any incorporated place.

Is Trego County part of a metropolitan area?

No. Trego County is outside every metropolitan and micropolitan statistical area in the July 2023 OMB delineation.

How many ZIP codes are in Trego County?

8 ZIP Code Tabulation Areas have land in Trego County, and 3 of them have most of their land inside the county. Census ZIP Code Tabulation Areas approximate USPS ZIP Code areas.

How does Trego County compare with U.S. states?

It has less land than every state. Rhode Island, the smallest, has 1.2 times as much land.

How many acres of land are in Trego County?

The land measurement converts to approximately 569,263 acres. Including water, total area is approximately 575,758 acres. One square mile equals 640 acres.

Why might another source show a different area?

Check whether it reports land or total area, its Census vintage, and its rounding. Our guide explains how to reconcile county area figures.

Can this establish a property boundary?

No. Statistical measurements and generalized maps do not establish property lines. Consult the relevant local surveying or land-records authority.

Cite this county

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