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Where am ILOCATED

Dubuque County, Iowa

Dubuque County, Iowa, has 99,381 residents (July 2025 estimate). Its county seat is Dubuque. It uses Central Time and covers 608 sq mi (1,575 km²) of land.

Des MoinesCedar RapidsDavenport
Dubuque County in Iowa
DubuqueAsburyDyersvilleCascadePeosta
Dubuque County and its neighbors (simplified outlines). Open in OpenStreetMap ↗
Resident population, July 2025
99,381
Land area
608 sq mi (1,575 km²)
County seat or government
Dubuque
Time zone
Central TimeUTC-06:00 in January; UTC-05:00 in July
Median household income
$77,630 ± $2,303
Median home value
$237,300 ± $4,972
Median rent, with utilities
$959 ± $26
Homes lived in by their owners
73.3% ± 1.0 points
County type
County
Metro or micro area
Dubuque, IA metro areaCentral county
Water area
8.16 sq mi (21.1 km²)
State
Iowa
County code (FIPS)
19061
Coordinates (central point)
42.463481, -90.878771
Open this point in the location finder

These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.

Time zones in Dubuque County

Time zoneLocal time and UTC offsetNext clock change
Central TimeAmerica/ChicagoUTC-06:00 in January; UTC-05:00 in July. Enable JavaScript for the live clock.Enable JavaScript for upcoming changes.

Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.

ZIP Code areas, largest first

  1. 5200143,101 people
  2. 5200217,005 people
  3. 5200313,796 people
  4. 520405,584 people
  5. 520315,403 people
  6. 520685,280 people
  7. 520333,292 people
  8. 520463,129 people
  9. 520522,999 people
  10. 520452,777 people
  11. 522371,830 people
  12. 520731,381 people
All 20
  1. 520321,305 people
  2. 520531,148 people
  3. 520391,079 people
  4. 52079995 people
  5. 52078870 people
  6. 52054794 people
  7. 52065671 people
  8. 52056229 people

20 ZIP Code areas overlap Dubuque County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.

Official county information

Dubuque County government website ↗ is the next stop for county offices, tax, voting, jury and records information. A geographic lookup cannot determine eligibility, tax liability or a court obligation.

Townships in Dubuque County, largest first

  1. Dubuque Township7,800 people
  2. Taylor Township4,673 people
  3. New Wine Township4,558 people
  4. Vernon Township4,171 people
  5. Table Mound Township3,440 people
  6. Center Township2,908 people
  7. Mosalem Township1,995 people
  8. Dodge Township1,774 people
  9. Peru Township1,483 people
  10. Whitewater Township1,409 people
  11. Jefferson Township1,302 people
  12. Cascade Township1,288 people
All 18
  1. Concord Township818 people
  2. Prairie Creek Township699 people
  3. Liberty Township598 people
  4. Iowa Township549 people
  5. Washington Township391 people
  6. Julien Township0 people

People counts are American Community Survey 2020–2024 5-year estimates. All townships in Iowa, by county

School districts in Dubuque County, largest first

  1. Dubuque Community School District79,101 people
  2. Western Dubuque County Community School District22,697 people
  3. Maquoketa Community School District8,519 people
  4. Monticello Community School District6,887 people

Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.

Cities, towns and communities, largest first

These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.

  1. Dubuque, Iowa (city)59,174 people
  2. Asbury, Iowa (city)5,989 people
  3. Dyersville, Iowa (city)4,423 people
  4. Cascade, Iowa (city)2,375 people
  5. Peosta, Iowa (city)2,040 people
  6. Epworth, Iowa (city)1,894 people
  7. Farley, Iowa (city)1,889 people
  8. Worthington, Iowa (city)431 people
  9. New Vienna, Iowa (city)372 people
  10. Holy Cross, Iowa (city)280 people
  11. Rickardsville, Iowa (city)234 people
  12. Luxemburg, Iowa (city)229 people
All 21
  1. Sherrill, Iowa (city)162 people
  2. Centralia, Iowa (city)117 people
  3. Bernard, Iowa (city)112 people
  4. Sageville, Iowa (city)88 people
  5. Zwingle, Iowa (city)76 people
  6. Balltown, Iowa (city)72 people
  7. Graf, Iowa (city)47 people
  8. Durango, Iowa (city)18 people
  9. Bankston, Iowa (city)14 people

Bordering areas, nearest first

Distances are straight lines between map points.

  1. Delaware County, Iowa25 mi west
  2. Jackson County, Iowa26 mi southeast
  3. Jones County, Iowa26 mi southwest
  4. Grant County, Wisconsin30 mi north
  5. Clayton County, Iowa35 mi northwest
  6. Jo Daviess County, Illinois35 mi east

Before using this answer on a form

Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.

Find the county where you are now, check its ZIP area, or check the time zone where you are.

See this county on Census.gov ↗

Areas that only touch the edge

These areas meet the boundary only along a sliver. Most addresses here are not in them; for an address near the line, check with the county.