County · code 24025
Harford CountyMaryland
Harford County is a county in Maryland with its seat in Bel Air. It was founded in 1774.
- Founded1774
- County seatBel Air
- Named forHenry Harford
- Land area437 sq mi + 90 sq mi water
- Population260,924 2020 Census
- Parcels mapped104,110 checked 14 October 2026
Where it is
Harford on the map of Maryland
Maryland has 24 counties and county equivalents, each with its own records office. Shapes with a page are links.
History
Formed in 1774 from Baltimore County
An old deed may name a county that no longer exists, or a boundary that has since moved.
Harford County was created in 1774 from Baltimore County and named after Henry Harford.
- 1774
Land and parcels
What the maps cover in Harford
Who publishes each layer, how good it is, and when we last checked.
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Parcels Good enough
Lot lines and tax-map numbers for 104,110 parcels from Harford County. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
edited 28 May 2026 · checked 14 October 2026 -
Address points Missing
No public address points layer found for Harford County yet.
-
Buildings Reference
Roof outlines traced from aerial imagery from FEMA Response Geospatial Office with Oak Ridge National Laboratory (ORNL). Good for seeing what is on a lot; not accurate enough to set a fence from.
checked 18 October 2026
- Official
- from the office that keeps the record
- Good enough
- a reliable statewide or national copy
- Fallback
- a guide only; check the official record
- Missing
- nothing public found yet
People and land
Harford by the Census
Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.
Rules and offices
Who to ask before you build, dig or sell
Official county pages only. We link to them; we do not copy them, because they change.
Inside a city or town, permits usually come from that city rather than the county.
Records
- Clerk of court: deeds and plats
Circuit Court
Permits
Zoning and code
GIS and maps
County government
- County government
The official website of Harford County.
See your own lot on these maps
Open Harford County on Parcel Chart's free map and click your parcel. Save it with a free account; the full record of your place (site map, projects, documents) is Pro, in early access.
Questions
Common questions about Harford County
- When was Harford County founded?
- Harford County was founded in 1774, formed from Baltimore County, and named after Henry Harford.
- What is the county seat of Harford County?
- The county seat of Harford County is Bel Air.
- Is there an online parcel map for Harford County?
- Yes. Harford County publishes a parcel map of 104,110 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Harford County's boundary or name changed?
- Harford County was created in 1774 from Baltimore County. The Atlas of Historical County Boundaries records no boundary change since.
- Who issues building permits in Harford County?
- The county's page on building permits: Bonding and Permit Administration. Inside a city or town, ask that city first.
- Who issues septic and well permits in Harford County?
- The county's page on septic systems and wells: Health department: septic and well.
- Is my lot in a flood zone?
- We do not have flood maps for Harford County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby