Menu
The state atlas

County maps by state

Choose a state for a labelled boundary map and an alphabetical list of every county or county-equivalent. Together, these maps cover 3,144 current county-equivalents.

50 states and Washington, D.C.

Alabama67 countiesAlaska30 boroughs and census areasArizona15 countiesArkansas75 countiesCalifornia58 countiesColorado64 countiesConnecticut9 planning regionsDelaware3 countiesDistrict of Columbia1 county-equivalentFlorida67 countiesGeorgia159 countiesHawaii5 countiesIdaho44 countiesIllinois102 countiesIndiana92 countiesIowa99 countiesKansas105 countiesKentucky120 countiesLouisiana64 parishesMaine16 countiesMaryland24 counties and an independent cityMassachusetts14 countiesMichigan83 countiesMinnesota87 countiesMississippi82 countiesMissouri115 counties and an independent cityMontana56 countiesNebraska93 countiesNevada17 counties and an independent cityNew Hampshire10 countiesNew Jersey21 countiesNew Mexico33 countiesNew York62 countiesNorth Carolina100 countiesNorth Dakota53 countiesOhio88 countiesOklahoma77 countiesOregon36 countiesPennsylvania67 countiesRhode Island5 countiesSouth Carolina46 countiesSouth Dakota66 countiesTennessee95 countiesTexas254 countiesUtah29 countiesVermont14 countiesVirginia133 counties and independent citiesWashington39 countiesWest Virginia55 countiesWisconsin72 countiesWyoming23 counties
Compare state systems

How county geography varies by state

The United States does not use one uniform county system. The average state has about 63 county-level units, but the range is wide: Texas has 254, while Delaware has only 3. Population does not determine the number. State history, settlement patterns, land area, and local-government law all shaped the map.

County names also describe only part of the picture. A nationwide dataset must account for Louisiana parishes, Alaska boroughs and census areas, Connecticut planning regions, and independent cities. These areas appear in the atlas because the Census Bureau treats them at the same statistical level as counties.

SystemWhere it appearsWhat to know
ParishesLouisianaParishes fill the county-level role across the state.
Boroughs and census areasAlaskaBoroughs cover organized areas; census areas divide the remaining unorganized borough for statistics.
Planning regionsConnecticutNine planning regions replaced the former eight counties as federal county-equivalents.
Independent citiesVirginia; also Maryland, Missouri, and NevadaThese cities are not legally inside a county and receive county-equivalent codes.
Federal districtWashington, D.C.The District is represented as one county-equivalent.

For more detail, read the complete guide to county-equivalents.

Reference table

County count and largest county by state

Counts follow 2025 Census county-equivalent geography. “Largest” refers to land area, not population.

State or districtRegionCounty-level unitsLocal terminologyLargest by land area
AlabamaSouth67countiesBaldwin County · 1,589.9 sq mi
AlaskaWest30boroughs and census areasYukon-Koyukuk Census Area · 145,767.5 sq mi
ArizonaWest15countiesCoconino County · 18,616.4 sq mi
ArkansasSouth75countiesUnion County · 1,039.1 sq mi
CaliforniaWest58countiesSan Bernardino County · 20,068.4 sq mi
ColoradoWest64countiesLas Animas County · 4,772.9 sq mi
ConnecticutNortheast9planning regionsCapitol Planning Region · 1,027.4 sq mi
DelawareSouth3countiesSussex County · 936.1 sq mi
District of ColumbiaSouth1county-equivalentDistrict of Columbia · 61.1 sq mi
FloridaSouth67countiesCollier County · 1,997 sq mi
GeorgiaSouth159countiesWare County · 899.4 sq mi
HawaiiWest5countiesHawaii County · 4,028.4 sq mi
IdahoWest44countiesIdaho County · 8,477.5 sq mi
IllinoisMidwest102countiesMcLean County · 1,183.2 sq mi
IndianaMidwest92countiesAllen County · 657.1 sq mi
IowaMidwest99countiesKossuth County · 972.7 sq mi
KansasMidwest105countiesButler County · 1,429.7 sq mi
KentuckySouth120countiesPike County · 786.2 sq mi
LouisianaSouth64parishesVernon Parish · 1,326.7 sq mi
MaineNortheast16countiesAroostook County · 6,671.2 sq mi
MarylandSouth24counties and an independent cityFrederick County · 660.6 sq mi
MassachusettsNortheast14countiesWorcester County · 1,510.7 sq mi
MichiganMidwest83countiesMarquette County · 1,809.1 sq mi
MinnesotaMidwest87countiesSt. Louis County · 6,248.1 sq mi
MississippiSouth82countiesYazoo County · 922.3 sq mi
MissouriMidwest115counties and an independent cityTexas County · 1,177.3 sq mi
MontanaWest56countiesBeaverhead County · 5,542.7 sq mi
NebraskaMidwest93countiesCherry County · 5,960.1 sq mi
NevadaWest17counties and an independent cityNye County · 18,181.9 sq mi
New HampshireNortheast10countiesCoos County · 1,794.6 sq mi
New JerseyNortheast21countiesBurlington County · 799.3 sq mi
New MexicoWest33countiesCatron County · 6,924.2 sq mi
New YorkNortheast62countiesSt. Lawrence County · 2,679.5 sq mi
North CarolinaSouth100countiesRobeson County · 947.3 sq mi
North DakotaMidwest53countiesMcKenzie County · 2,760.1 sq mi
OhioMidwest88countiesAshtabula County · 702.4 sq mi
OklahomaSouth77countiesOsage County · 2,246.7 sq mi
OregonWest36countiesHarney County · 10,134.5 sq mi
PennsylvaniaNortheast67countiesLycoming County · 1,228.9 sq mi
Rhode IslandNortheast5countiesProvidence County · 409.5 sq mi
South CarolinaSouth46countiesHorry County · 1,133.2 sq mi
South DakotaMidwest66countiesMeade County · 3,470.9 sq mi
TennesseeSouth95countiesShelby County · 752.8 sq mi
TexasSouth254countiesBrewster County · 6,183.8 sq mi
UtahWest29countiesSan Juan County · 7,823.7 sq mi
VermontNortheast14countiesWindsor County · 969.1 sq mi
VirginiaSouth133counties and independent citiesPittsylvania County · 969 sq mi
WashingtonWest39countiesOkanogan County · 5,266.2 sq mi
West VirginiaSouth55countiesRandolph County · 1,039.7 sq mi
WisconsinMidwest72countiesMarathon County · 1,545.2 sq mi
WyomingWest23countiesSweetwater County · 10,427 sq mi

Land-area values are rounded from the Census boundary-file fields. A generalized map and rounded area are suitable for reference and comparison, not for legal boundary measurement.

Choose the next step

Use the right county resource

Compare the national pattern

The national county map makes the contrast between small eastern counties and larger western divisions immediately visible.

Resolve an ambiguous name

Search a name such as Washington or Franklin and see every matching state plus the five-digit county FIPS code.