Parcel Chartplaces Open the free map

County · code 24043

Washington CountyMaryland

Washington County is located in Maryland and was formed on October 2, 1776, from Frederick County with Hagerstown as its county seat. The county was named after George Washington.

  • Founded1776
  • County seatHagerstown
  • Named forGeorge Washington
  • Land area458 sq mi + 9.6 sq mi water
  • Population154,705 2020 Census
  • Parcels mapped62,286 checked 14 October 2026
Open the free map Click any parcel in Washington County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

Berkeley, WVJefferson, WVFranklin, PAFrederickFulton, PAMorgan, WVLoudoun, VAAllegany Hagerstown Census outline · seat marked

Where it is

Washington on the map of Maryland

Maryland has 24 counties and county equivalents, each with its own records office. Shapes with a page are links.

Allegany CountyAnne Arundel CountyBaltimore CountyCalvert CountyCaroline CountyCarroll CountyCecil CountyCharles CountyDorchester CountyFrederick CountyGarrett CountyHarford CountyHoward CountyKent CountyMontgomery CountyPrince George's CountyQueen Anne's CountySt. Mary's CountySomerset CountyTalbot CountyWicomico CountyWorcester CountyBaltimore cityWashington County Washington
Counties of Maryland · Washington highlighted

History

Formed in 1776 from Frederick County

An old deed may name a county that no longer exists, or a boundary that has since moved.

Washington County was created from Frederick County on October 2, 1776. In 1789, the county lost territory to the creation of Allegany County.

Boundary changes from the Newberry Library, Atlas of Historical County Boundaries.

  1. 1776
    Washington County created Washington created from Frederick.
    from Frederick
    · Md., Laws Since 1763, "Proceedings of Convention," 6 Sep. 1776
  2. 1789
    Lost territory Washington lost to creation of Allegany.
    to Allegany
    · Md. Laws 1789, Nov. sess., ch. 19

Land and parcels

What the maps cover in Washington

Who publishes each layer, how good it is, and when we last checked.

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

Washington by the Census

Population
154,705 2020 Census count
Housing units
63,790 2020 Census count
Land area
458 square miles
Water area
9.6 square miles
People per sq mi
338 population ÷ land area

Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.

Rules and offices

Washington County's official site

We have found the county's site but not its offices yet; start there.

County government

See your own lot on these maps

Open Washington 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.

Open the free map no sign-in Pro early access

Questions

Common questions about Washington County

When was Washington County founded?
Washington County was founded in 1776, formed from Frederick County, and named after George Washington.
What is the county seat of Washington County?
The county seat of Washington County is Hagerstown.
Is there an online parcel map for Washington County?
Yes. A public source publishes a parcel map of 62,286 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Washington County's boundary or name changed?
Washington County was created in 1776 from Frederick County. Since then the Atlas of Historical County Boundaries records 1 later change, chiefly involving Allegany County.
Is my lot in a flood zone?
We do not have flood maps for Washington County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

Nearby

Counties next door