Collin County, Texas

County seat: McKinney · Population 1.3 million (2025) · 842 sq mi

Collin County is the 6th most populous of Texas's 254 counties, with 1,297,179 people (2025 estimate). Its county seat is McKinney. It is part of the Metroplex region, one of the 12 Texas Comptroller economic regions. The map shows its 32 cities and towns and the 6 neighboring counties.

Map of Collin County, Texas with cities, towns and the county boundary
Collin County, Texas with its cities and towns, unincorporated communities (CDPs) and neighboring counties. Boundaries: U.S. Census Bureau, 2025. Free to use with attribution (CC BY 4.0).
Download PDF (Letter) 186 KBPNG image 91 KBTexas county map

Collin County facts

County seat
McKinney
Population (2025 estimate)
1,297,179 +21.7% since 2020
Land area
842 sq mi 186th largest of 254
Water area
44 sq mi
Population density
1,541 per sq mi
Established
1846
Named after
Collin McKinney land surveyor, merchant, politician, and lay preacher
Largest city
Plano 287,323 in the county
Median household income
$121,600
Cities and towns
32 plus 2 CDPs
ZIP codes
40
Time zone
Central
FIPS code
48085

Cities and towns in Collin County

Collin County has 32 incorporated cities, towns and villages. Populations count the people living inside Collin County; cities that cross a county line also list the other counties.

NameTypePopulation 2025Also in
PlanoCity287,323Denton County
McKinney (county seat)City236,001
FriscoCity140,753Denton County
AllenCity113,447
WylieCity60,563Dallas and Rockwall counties
CelinaCity58,358Denton County
DallasCity54,266Dallas, Denton, Kaufman and Rockwall counties
PrincetonCity43,524
RichardsonCity42,906Dallas County
ProsperTown36,228Denton County
AnnaCity35,245
MelissaCity29,969
MurphyCity20,985
SachseCity12,212Dallas County
LavonCity11,888
FairviewTown10,913
JosephineCity10,040Hunt County
LucasCity8,896
ParkerCity6,462
FarmersvilleCity5,531
Royse CityCity4,716Hunt and Rockwall counties
Lowry CrossingCity2,521
NevadaCity1,522
Blue RidgeCity1,265
WestonCity1,140
St. PaulTown994
CarrolltonCity691Dallas and Denton counties
New HopeTown687
GarlandCity167Dallas County
HebronTown0Denton County
TrentonCity0Fannin and Grayson counties
Van AlstyneCity0Grayson County

Unincorporated communities (CDPs)

Census-designated places are communities without their own city government; the county provides their services.

CommunityPopulationAlso in
Seis Lagos1,391
Westminster738

ZIP codes in Collin County

40 ZIP codes reach into Collin County. ZIP codes ignore county lines, so some also cover a neighboring county.

Population of Collin County, 2020–2025

Collin County grew by 230,978 people (+21.7%) between April 2020 and July 2025: 34,977 more births than deaths and a net gain of 196,570 people from migration.

Year (July 1)Population
20201,075,512
20211,114,667
20221,163,646
20231,207,386
20241,254,213
20251,297,179

Neighboring counties

Printable Collin County map

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Sources

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