Dubuque County

Parcel & Property Data

52,356Total Parcels

—Avg. Market Value

378,280Total Acres (measured from parcel boundaries)

About This Data

LandBrief holds 52,356 parcel records for Dubuque County, sourced from county records. Each includes the parcel boundary, and — where the county publishes them — owner, situs address, acreage, assessed values and legal description.

Data from the Dubuque County assessor roll dated March 2026, loaded August 2026. See data sources for every county’s vintage.

Explore Dubuque County

Dubuque County by the Numbers

Median parcel size: 0.36 acres
measured from mapped boundaries
90th-percentile parcel: 37.2 acres
County land area: 389,311 acres
U.S. Census measurement
Communities: 550
0.3% of parcels outside any incorporated place

Who Owns Dubuque County?

Share of the county’s 52,356 parcels by the kind of owner on record. Classified from owner names, so the boundaries are approximate; an entity the rules cannot place counts as an individual.

Owner type	Share of parcels
Individuals	76.2%
Companies & organizations	14.2%
Trusts & estates	8.1%
Government	0.8%
Other / unclassified	0.7%

The largest owner on record is DUBUQUE, CITY OF with 750 parcels — see the full landowner leaderboard.

Parcel Records (~52,356 total)

Showper page

Parcel ID	Owner	Address	City	Acreage
1831100007	ROGERS, SUSAN E LIVING TRUST	—	Monticello	20.17 †
1831100008	KURT, MARVIN & GRACE	—	Cascade	20.15 †
1831200003	KURT, MARVIN & GRACE	—	Cascade	38.29 †
1831200005	AGRI-VEST INC	—	Earlville	4.46 †
1831300002	ROGERS, SUSAN E LIVING TRUST	—	Monticello	39.00 †
1831300004	ROGERS, SUSAN E LIVING TRUST	—	Monticello	38.72 †
1831400001	ALTHOFF, ALICE M	—	Lamotte	37.80 †
1831400003	ALTHOFF, ALICE M	—	Lamotte	39.01 †
1832100005	GREEN, MELVIN J & EDWARD A-EACH 1/2	—	Dubuque	4.97 †
1832100006	GREEN, MELVIN J & EDWARD A-EACH 1/2	—	Dubuque	40.68 †

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Frequently Asked Questions

How many parcels are in Dubuque County?

The Dubuque County assessor roll on file records 52,356 parcels across 550 communities, with 0.3% lying outside any incorporated place.

Who owns the most land in Dubuque County?

DUBUQUE, CITY OF holds 750 parcels, the most of any owner on record — the largest-landowners leaderboard ranks the top 25.

What is the typical parcel size in Dubuque County?

Measured from mapped boundaries, the median parcel is 0.36 acres, and nine parcels in ten are under 37.2 acres. Boundary-measured area closely tracks deeded acreage but is not the deed.

How much of Dubuque County is government-owned?

Government entities — federal, state, and local — hold 0.8% of the county’s parcels, classified from owner names on the roll.

How current is this data?

It comes from the Dubuque County assessor roll dated March 2026. Counties deliver on their own schedules; the methodology page explains how records are processed and the data sources page tracks every county’s vintage.

Browse by City (550)

52,356 parcels across 550 communities in Dubuque County.