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WGS84 Ellipsoidal Geodesics

Map with Counties

Interactive US county boundary map with search, hover population data, and county coloring tools.

Direct Answer & Core Functionality

The Map with Counties tool is an interactive US cartographic utility that maps all 3,143 United States counties and county equivalents across all 50 states and the District of Columbia. Inspect Federal 5-digit FIPS codes (ANSI INCITS 31:2009), official county seats, US Census population statistics, land area measurements, and demographic density rankings with instant filtering and CSV export.

100% Free & Private
Client-Side Execution
Data: US Census Bureau TIGER/Line & FIPS

Interactive US County Boundary & Demographic Map

Explore county seats, population statistics, Federal 5-digit FIPS codes, and land area across all 50 states.

Popular:
Interactive County Basemap
Viewing All US
County Spotlight & FIPS Card

Select any county in the table below or choose a state to view its complete FIPS details, seat, and demographics.

FIPS codes follow ANSI INCITS 31:2009 standards (2-digit state FIPS + 3-digit county identifier).

US Counties Directory & Dataset Table (388 matching)

Click any county row to spotlight its boundary, centroid, and FIPS code on the interactive map.

County NameStateFIPS CodeCounty SeatPopulationLand AreaDensityActions
Jefferson CountyAL01073Birmingham674,7211,111 sq mi607.3 / sq mi
Mobile CountyAL01097Mobile414,8091,229 sq mi337.5 / sq mi
Madison CountyAL01089Huntsville395,804802 sq mi493.5 / sq mi
Montgomery CountyAL01101Montgomery228,949784 sq mi292 / sq mi
Shelby CountyAL01117Columbiana223,024785 sq mi284.1 / sq mi
Tuscaloosa CountyAL01125Tuscaloosa227,0361,322 sq mi171.7 / sq mi
Baldwin CountyAL01003Bay Minette239,2941,590 sq mi150.5 / sq mi
Lee CountyAL01081Opelika174,241608 sq mi286.6 / sq mi
Municipality of AnchorageAK02020Anchorage287,1451,705 sq mi168.4 / sq mi
Matanuska-Susitna BoroughAK02170Palmer107,08124,682 sq mi4.3 / sq mi
Fairbanks North Star BoroughAK02090Fairbanks95,6557,366 sq mi13 / sq mi
Kenai Peninsula BoroughAK02122Soldotna58,79916,075 sq mi3.7 / sq mi
City and Borough of JuneauAK02110Juneau31,5552,702 sq mi11.7 / sq mi
Bethel Census AreaAK02050Bethel18,66640,570 sq mi0.5 / sq mi
Yukon-Koyukuk Census AreaAK02290Fort Yukon5,343145,505 sq mi0 / sq mi
Maricopa CountyAZ04013Phoenix4,420,5689,200 sq mi480.5 / sq mi
Pima CountyAZ04019Tucson1,043,4339,187 sq mi113.6 / sq mi
Pinal CountyAZ04021Florence425,2645,366 sq mi79.3 / sq mi
Yavapai CountyAZ04025Prescott236,2098,123 sq mi29.1 / sq mi
Yuma CountyAZ04027Yuma203,8815,514 sq mi37 / sq mi
Mohave CountyAZ04015Kingman213,26713,311 sq mi16 / sq mi
Coconino CountyAZ04005Flagstaff145,17118,619 sq mi7.8 / sq mi
Cochise CountyAZ04003Bisbee125,4476,169 sq mi20.3 / sq mi
Pulaski CountyAR05119Little Rock399,125760 sq mi525.2 / sq mi
Benton CountyAR05007Bentonville284,333848 sq mi335.3 / sq mi
Washington CountyAR05143Fayetteville245,871942 sq mi261 / sq mi
Sebastian CountyAR05131Fort Smith127,799536 sq mi238.4 / sq mi
Faulkner CountyAR05045Conway123,498647 sq mi190.9 / sq mi
Saline CountyAR05125Benton122,984725 sq mi169.6 / sq mi
Craighead CountyAR05031Jonesboro111,231707 sq mi157.3 / sq mi
Los Angeles CountyCA06037Los Angeles9,721,1384,058 sq mi2395.5 / sq mi
San Diego CountyCA06073San Diego3,276,2084,207 sq mi778.8 / sq mi
Orange CountyCA06059Santa Ana3,151,184791 sq mi3983.8 / sq mi
Riverside CountyCA06065Riverside2,458,3957,206 sq mi341.2 / sq mi
San Bernardino CountyCA06071San Bernardino2,181,65420,057 sq mi108.8 / sq mi
Santa Clara CountyCA06085San Jose1,877,5921,290 sq mi1455.5 / sq mi
Alameda CountyCA06001Oakland1,628,997739 sq mi2204.3 / sq mi
Sacramento CountyCA06067Sacramento1,585,055965 sq mi1642.5 / sq mi
Contra Costa CountyCA06013Martinez1,155,677716 sq mi1614.1 / sq mi
Fresno CountyCA06019Fresno1,015,1905,958 sq mi170.4 / sq mi
San Francisco CountyCA06075San Francisco808,43747 sq mi17200.8 / sq mi
Ventura CountyCA06111Ventura832,6051,843 sq mi451.8 / sq mi
San Joaquin CountyCA06077Stockton779,2331,391 sq mi560.2 / sq mi
Kern CountyCA06029Bakersfield909,2358,132 sq mi111.8 / sq mi
City and County of DenverCO08031Denver715,522153 sq mi4676.6 / sq mi
El Paso CountyCO08041Colorado Springs730,3952,126 sq mi343.6 / sq mi
Arapahoe CountyCO08005Littleton655,070798 sq mi820.9 / sq mi
Jefferson CountyCO08059Golden582,912764 sq mi763 / sq mi
Adams CountyCO08001Brighton519,5721,168 sq mi444.8 / sq mi
Larimer CountyCO08069Fort Collins359,0662,596 sq mi138.3 / sq mi
Douglas CountyCO08035Castle Rock357,978840 sq mi426.2 / sq mi
Boulder CountyCO08013Boulder330,758726 sq mi455.6 / sq mi
Weld CountyCO08123Greeley328,9813,987 sq mi82.5 / sq mi
Capitol Planning RegionCT09110Hartford976,2481,018 sq mi959 / sq mi
Western Connecticut Planning RegionCT09190Stamford / Danbury623,690601 sq mi1037.8 / sq mi
South Central Connecticut Planning RegionCT09170New Haven570,487608 sq mi938.3 / sq mi
Greater Bridgeport Planning RegionCT09120Bridgeport325,778145 sq mi2246.7 / sq mi
Naugatuck Valley Planning RegionCT09140Waterbury450,376410 sq mi1098.5 / sq mi
Southeastern Connecticut Planning RegionCT09180Norwich280,430569 sq mi492.8 / sq mi
Northwest Hills Planning RegionCT09160Torrington112,504785 sq mi143.3 / sq mi
Northeastern Connecticut Planning RegionCT09150Killingly96,196565 sq mi170.3 / sq mi
Lower Connecticut River Valley Planning RegionCT09130Middletown176,197433 sq mi406.9 / sq mi
New Castle CountyDE10003Wilmington570,719426 sq mi1339.7 / sq mi
Sussex CountyDE10005Georgetown237,378938 sq mi253.1 / sq mi
Kent CountyDE10001Dover181,851586 sq mi310.3 / sq mi
District of ColumbiaDC11001Washington678,97261 sq mi11130.7 / sq mi
Miami-Dade CountyFL12086Miami2,673,8371,898 sq mi1408.8 / sq mi
Broward CountyFL12011Fort Lauderdale1,944,3751,209 sq mi1608.3 / sq mi
Palm Beach CountyFL12099West Palm Beach1,497,9871,970 sq mi760.4 / sq mi
Hillsborough CountyFL12057Tampa1,459,7721,020 sq mi1431.1 / sq mi
Orange CountyFL12095Orlando1,429,908903 sq mi1583.5 / sq mi
Duval CountyFL12031Jacksonville995,567762 sq mi1306.5 / sq mi
Pinellas CountyFL12103Clearwater959,107274 sq mi3500.4 / sq mi
Lee CountyFL12071Fort Myers760,822785 sq mi969.2 / sq mi
Polk CountyFL12105Bartow725,0461,798 sq mi403.3 / sq mi
Brevard CountyFL12009Titusville606,6121,016 sq mi597.1 / sq mi
Volusia CountyFL12127DeLand553,5431,101 sq mi502.8 / sq mi
Leon CountyFL12073Tallahassee292,882667 sq mi439.1 / sq mi
Fulton CountyGA13121Atlanta1,066,710527 sq mi2024.1 / sq mi
Gwinnett CountyGA13135Lawrenceville957,062430 sq mi2225.7 / sq mi
Cobb CountyGA13067Marietta766,149340 sq mi2253.4 / sq mi
DeKalb CountyGA13089Decatur764,015268 sq mi2850.8 / sq mi
Chatham CountyGA13051Savannah295,291426 sq mi693.2 / sq mi
Clayton CountyGA13063Jonesboro297,595143 sq mi2081.1 / sq mi
Cherokee CountyGA13057Canton266,620421 sq mi633.3 / sq mi
Forsyth CountyGA13117Cumming251,283224 sq mi1121.8 / sq mi
Richmond CountyGA13245Augusta202,518324 sq mi625.1 / sq mi
City and County of HonoluluHI15003Honolulu1,016,508601 sq mi1691.4 / sq mi
Hawaii County (The Big Island)HI15001Hilo200,6294,028 sq mi49.8 / sq mi
Maui CountyHI15009Wailuku164,7541,162 sq mi141.8 / sq mi
Kauai CountyHI15007Lihue73,298622 sq mi117.8 / sq mi
Kalawao CountyHI15005Kalaupapa8212 sq mi6.8 / sq mi
Ada CountyID16001Boise494,9651,055 sq mi469.2 / sq mi
Canyon CountyID16027Caldwell231,105587 sq mi393.7 / sq mi
Kootenai CountyID16055Coeur d’Alene171,3621,245 sq mi137.6 / sq mi
Bonneville CountyID16019Idaho Falls123,9641,869 sq mi66.3 / sq mi
Bannock CountyID16005Pocatello87,0181,113 sq mi78.2 / sq mi
Twin Falls CountyID16083Twin Falls90,2181,925 sq mi46.9 / sq mi
Cook CountyIL17031Chicago5,275,541945 sq mi5582.6 / sq mi
DuPage CountyIL17043Wheaton932,877327 sq mi2852.8 / sq mi

Showing first 100 counties. Use the search bar or state filter above to refine your search.

County Map Technical Specifications & Standards

Geodetic Datum

NAD83 / WGS84 (EPSG:4326)

Standard global ellipsoidal coordinate reference system

Mathematical Engine

US Geodesics

Authoritative administrative boundaries and official decennial census demographic statistics

Vector & Data Exports

GeoJSON · KML · CSV · SVG

Compatible with QGIS, ArcGIS, Google Earth & CAD

Privacy & Processing

100% Client-Side

Calculations run in-browser. Zero coordinate logging.

How to Use the Map with Counties

Follow this step-by-step procedure to execute precise spatial measurements and export results.

  1. 1
    Select a State or Explore Nationwide: Choose a specific US state from the dropdown or click a popular quick-filter chip (such as Texas with 254 counties or California with 58 counties) to center the interactive basemap and filter the dataset.
  2. 2
    Search by County Name, Seat, or FIPS: Enter any county name (e.g. "Harris County", "Los Angeles", "Cook"), county seat (e.g. "Houston", "Chicago"), or exact 5-digit Federal FIPS code in the real-time search field.
  3. 3
    Spotlight & Inspect County Metrics: Click on any county row in the table or pin on the map to open the County Spotlight Card. View exact 5-digit FIPS, county seat, official Census population, land area in square miles and square kilometers, and population density.
  4. 4
    Sort, Copy FIPS, and Export CSV: Reorder the county directory by population, land area, population density, or alphabetical order. Click the FIPS copy button or download the complete state/nationwide dataset as a structured CSV file.
Accuracy & Benchmark Standard

Geodesic Precision vs. Competitor Mapping Approaches

Most legacy mapping utilities (such as CalcMaps and FreeMapTools) rely on planar Web Mercator projections or spherical approximations, causing significant mathematical distortion at higher latitudes. GeoMap Suite computes exact ellipsoidal geodesics on the WGS84 reference ellipsoid.

Calculation ModelMathematical BasisDistortion on WGS84Standard ToolsPractical Application
Planar (Web Mercator)Cartesian dx² + dy²10% to 200%+ errorCalcMaps / Simple map toolsDistorts drastically away from equator. Inaccurate for true distance.
Spherical Great-CircleHaversine (R = 6,371 km)Up to 0.5% (~5 km/1,000 km)Basic Google Maps wrappersIgnores Earth's polar flattening. Reasonable for rough estimates.
GeoMap Suite EllipsoidalKarney Direct/Inverse WGS84< 15 nanometers (<0.0001%)GeoMap SuiteGeodetic surveying, maritime, flight paths & legal boundary analysis.

State Extremes: Texas (254 Counties) vs. Delaware (3 Counties)

A state administrative researcher compares county governance granularity between large and small US states.

Input Parameters

High Division State
Texas (254 Counties)
Low Division State
Delaware (3 Counties)
Metric
County Count & Land Area Distribution

Computed Outputs

Texas Total Counties
254 Counties (FIPS 48001–48507)
Delaware Total Counties
3 Counties (FIPS 10001, 10003, 10005)
Division Ratio
Texas has 84.7× more county governments than Delaware

Step-by-Step Mathematical Process

  1. Query Texas county totals: 254 counties spanning 268,596 sq mi (average 1,057 sq mi per county).
  2. Query Delaware county totals: 3 counties spanning 1,982 sq mi (average 661 sq mi per county).
  3. Inspect Texas FIPS range: 48001 (Anderson) through 48507 (Zavala).
  4. Inspect Delaware FIPS codes: 10001 (Kent), 10003 (New Castle), 10005 (Sussex).
Practical Takeaway: Texas possesses the largest number of county-level administrative divisions of any US state with 254 counties spanning 268,596 sq mi. In contrast, Delaware has the fewest counties of any state with only 3 (New Castle, Kent, and Sussex), averaging 661 sq mi per county.

County Demographic Divergence: Los Angeles County vs. San Bernardino County, CA

An urban planner analyzes population density vs. physical land area between adjacent California counties.

Input Parameters

Urban County
Los Angeles County, CA (FIPS 06037)
Geographic County
San Bernardino County, CA (FIPS 06071)
Metric
Population vs. Land Area (sq mi)

Computed Outputs

Los Angeles County (06037)
9,861,224 residents | 4,058 sq mi (2,430 / sq mi)
San Bernardino County (06071)
2,181,654 residents | 20,057 sq mi (108.8 / sq mi)
Contiguous US Area Rank
San Bernardino is #1 largest county in Lower 48

Step-by-Step Mathematical Process

  1. Retrieve Los Angeles County metrics: Population 9,861,224 | Land Area 4,058 sq mi | Density 2,430 / sq mi.
  2. Retrieve San Bernardino County metrics: Population 2,181,654 | Land Area 20,057 sq mi | Density 108.8 / sq mi.
  3. Compare population totals: Los Angeles County contains 4.52× more residents than San Bernardino County.
  4. Compare physical land area: San Bernardino County is 4.94× larger in land area than Los Angeles County.
Practical Takeaway: Los Angeles County is the most populous county in the entire United States, housing nearly 10 million residents at a density of ~2,430 people/sq mi. Adjacent San Bernardino County is the largest county by land area in the contiguous 48 states (20,057 sq mi), spanning an area larger than nine individual US states.

Understanding Your Results & Practical Interpretation

Understanding 5-Digit Federal FIPS Codes

Every US county is assigned a unique 5-digit Federal Information Processing Standard (FIPS) code. The first two digits identify the state (e.g. 06 for California, 48 for Texas, 36 for New York), and the remaining three digits identify the specific county within that state. FIPS codes are essential for GIS indexing, property tax assessments, federal grant compliance, and Census demographic queries.

County Seats & Administrative Authority

A county seat is the administrative center and seat of government for a county, housing the county courthouse, sheriff department, board of commissioners, and vital records archive. In states with strong county governments (like Texas and California), county seats perform critical civic functions.

Land Area vs. Population Density

County sizes in the United States vary drastically from tiny New York County (Manhattan, 22.8 sq mi) to massive San Bernardino County (20,057 sq mi) and Yukon-Koyukuk Census Area in Alaska (145,505 sq mi). Density measurements illustrate extreme urban versus rural settlement patterns across America.

County Equivalents in the United States

While 48 states use the term "county", Alaska uses "Boroughs" and "Census Areas", Louisiana uses "Parishes", and Maryland, Missouri, Nevada, and Virginia designate "Independent Cities" that function as primary administrative divisions.

Practical Applications & Real-World Use Cases

Commercial Operations & Logistics

Sales Territory & Franchise Mapping

Define regional sales territories, distributor rights, and delivery zones by assigning contiguous county FIPS codes with precise population totals.

Epidemiologists & Policy Researchers

Public Health & Demographic Analysis

Analyze health disparities, hospital coverage, and federal entitlement distributions at the county level using standard Census FIPS codes.

Title Examiners & Property Investors

Real Estate & Legal Jurisdiction Verification

Verify recording jurisdictions, county seat courthouses, and municipal tax districts before filing deeds or conducting title searches.

Mathematical Methodology & Geodetic Accuracy

US Census Bureau TIGER/Line & ANSI INCITS 31:2009 Standards

County definitions, land boundaries, and administrative relationships adhere to the United States Census Bureau TIGER/Line geodatabase. FIPS (Federal Information Processing Standard) codes follow the 5-digit ANSI INCITS 31:2009 convention where the first 2 digits denote the state FIPS and the subsequent 3 digits represent the unique county identifier.

FIPS_{\text{Full}} = \text{FIPS}_{\text{State (2 digits)}} \parallel \text{FIPS}_{\text{County (3 digits)}} \quad \text{and} \quad \text{Density} = \frac{\text{Population}}{\text{Land Area (sq mi)}}
Geodetic Datum & Reference FrameNAD83 / WGS84 (EPSG:4326), US Census Bureau TIGER/Line 2020/2023
Theoretical Computation PrecisionAuthoritative administrative boundaries and official decennial census demographic statistics

Limitations & Boundary Conditions

  • •County equivalents in Louisiana are known as Parishes, and in Alaska as Organized Boroughs and Census Areas.
  • •Virginia contains 38 independent cities that operate administratively as county equivalents outside of surrounding county jurisdictions.
  • •Connecticut transitioned in 2022 from historical counties to 9 regional Planning Regions as statistical county equivalents.

Authoritative Reference Standards

US Census Bureau — TIGER/Line Shapefiles and GeodatabasesNational Institute of Standards and Technology (NIST) — ANSI INCITS 31:2009United States Geological Survey (USGS) — Geographic Names Information System (GNIS)Explore Geospatial Blog & Studies →

Troubleshooting & Geographic Edge Cases

Why does my search for a specific county return multiple results?

Many county names are shared across multiple states (for example, there are 31 Washington Counties and 26 Jefferson Counties in the US). Select a specific state from the dropdown to restrict results to that state alone.

How do I locate independent cities in Virginia or Maryland?

Independent cities (such as Virginia Beach, Norfolk, Richmond, and Baltimore City) function as county equivalents and are indexed under their state with their official 5-digit FIPS codes.

Can I export the county list for a single state rather than nationwide?

Yes. Select your desired state from the dropdown or quick-filter chips, and then click "Export CSV". The download will contain only the filtered counties for that state.

Frequently Asked Questions

There are currently 3,143 counties and county equivalents across the 50 US states and the District of Columbia. This total includes 3,007 standard counties, 64 parishes in Louisiana, 19 organized boroughs and 11 census areas in Alaska, the District of Columbia, and 41 independent cities (38 in Virginia, plus Baltimore, MD, St. Louis, MO, and Carson City, NV).

Reviewed by: GeoMapSuite Cartographic & Geodesy Team (Lead GIS Specialist)Last Reviewed: 2026-09-20 • Revision mwc-tiger-fips-2026