When was Anne Arundel County founded?

Anne Arundel County was founded in 1650, formed from St. Marys County, and named after Anne Arundell.

What is the county seat of Anne Arundel County?

The county seat of Anne Arundel County is Annapolis.

Is there an online parcel map for Anne Arundel County?

Yes. Anne Arundel County publishes a parcel map of 241,929 parcels, rated fallback here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.

Has Anne Arundel County's boundary or name changed?

Anne Arundel County was created in 1650 from St. Marys County. Since then the Atlas of Historical County Boundaries records 9 later changes, chiefly involving Baltimore County, Calvert County and Howard County. It was formerly called Anne Arundel and Providence.

Is my lot in a flood zone?

We do not have flood maps for Anne Arundel County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

County · code 24003

Anne Arundel CountyMaryland

Anne Arundel County is a Maryland county formed in 1650 from St. Marys County, with its seat in Annapolis.

Founded1650
County seatAnnapolis
Named forAnne Arundell
Land area415 sq mi + 173 sq mi water
Population588,261 2020 Census
Parcels mapped241,929 checked 16 October 2026

Open the free map Click any parcel in Anne Arundel County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated 19 October 2026

Census outline · seat marked

History

Formed in 1650 from St. Marys County

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

Anne Arundel County was created in 1650 centered on the settlement of Providence and was named after Anne Arundell. The county was renamed Providence in 1654 and then Anne Arundel in 1658, and has experienced multiple boundary changes, losing territory to the creation of Calvert County in 1654, Baltimore County in 1660, Howard County in 1851, and Baltimore City in 1918.

Boundary changes from the Newberry Library, Atlas of Historical County Boundaries; the 5 that matter most are shown first.

1650
Anne Arundel County created Anne Arundel created from St. Marys. The county was centered on the settlement of Providence, but territorial limits were not otherwise specified.
from St. Marys
29 April 1650 · Archives of Md., 1:292
1654
Lost territory Anne Arundel lost to creation of Calvert; boundaries are estimated.
to Calvert
3 July 1654 · Archives of Md., 3:308
1654
Renamed Anne Arundel renamed Providence; Providence gained from Patuxent (now Calvert).
formerly Anne Arundel
20 October 1654 · Archives of Md., 1:341, 345, 347
c. 1658
Renamed Providence renamed Anne Arundel.
formerly Providence
24 March 1658 · Archives of Md., 1:369
1660
Lost territory By 12 January 1659/1660, Anne Arundel lost to creation of Baltimore.
to Baltimore
12 January 1660 · Archives of Md., 1:381

Show all 12 changes (7 more)

1650
Anne Arundel County created Anne Arundel created from St. Marys. The county was centered on the settlement of Providence, but territorial limits were not otherwise specified.
from St. Marys
29 April 1650 · Archives of Md., 1:292
1654
Lost territory Anne Arundel lost to creation of Calvert; boundaries are estimated.
to Calvert
3 July 1654 · Archives of Md., 3:308
1654
Renamed Anne Arundel renamed Providence; Providence gained from Patuxent (now Calvert).
formerly Anne Arundel
20 October 1654 · Archives of Md., 1:341, 345, 347
c. 1658
Renamed Providence renamed Anne Arundel.
formerly Providence
24 March 1658 · Archives of Md., 1:369
1660
Lost territory By 12 January 1659/1660, Anne Arundel lost to creation of Baltimore.
to Baltimore
12 January 1660 · Archives of Md., 1:381
1674
Gained territory Anne Arundel gained from Calvert and non-county area. Boundary between Anne Arundel and Baltimore was redefined (no change).
from Calvert from Baltimore
6 June 1674 · Archives of Md., 15:39
1698
Exchanged territory Anne Arundel exchanged with Baltimore.
with Baltimore
3 April 1698 · Archives of Md., 22:147
1727
Gained territory Anne Arundel gained from Baltimore.
from Baltimore
31 May 1727 · Archives of Md., 36:595
1824
Lost territory Anne Arundel lost to Calvert.
to Calvert
24 February 1824 · Md. Laws 1823, ch. 183, sec. 1/pp. 125-126
1825
Boundary clarified Boundary between Anne Arundel and Calvert was clarified (no change).
with Calvertno change
18 February 1825 · Md. Laws 1824, ch. 193/p. 147
1851
Lost territory Anne Arundel lost to creation of Howard.
to Howard
4 July 1851 · Md. Laws 1838, ch. 22, secs. 1, 4; Swindler, 4:413
1918
Lost territory Anne Arundel lost to Baltimore City (Ind. City). 29 March 1918 · Md. Laws 1918, ch. 82, sec. 1/p. 135

Land and parcels

What the maps cover in Anne Arundel

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

Parcels Fallback

Lot lines and tax-map numbers for 241,929 parcels from Anne Arundel County. Drawn for tax purposes: usually within a few feet of a survey, but not a survey. This copy is a fallback, not the county's own: use it as a guide and check the official record.
edited 24 June 2021 · checked 16 October 2026
Address points Missing

No public address points layer found for Anne Arundel 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

Anne Arundel by the Census

Population

588,261 2020 Census count

Housing units

233,130 2020 Census count

Land area

415 square miles

Water area

173 square miles

People per sq mi

1,418 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

Anne Arundel County's official site

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

County government

County government
The official website of Anne Arundel County.
aacounty.org

See your own lot on these maps

Open Anne Arundel 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 Anne Arundel County

When was Anne Arundel County founded?: Anne Arundel County was founded in 1650, formed from St. Marys County, and named after Anne Arundell.
What is the county seat of Anne Arundel County?: The county seat of Anne Arundel County is Annapolis.
Is there an online parcel map for Anne Arundel County?: Yes. Anne Arundel County publishes a parcel map of 241,929 parcels, rated fallback here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Anne Arundel County's boundary or name changed?: Anne Arundel County was created in 1650 from St. Marys County. Since then the Atlas of Historical County Boundaries records 9 later changes, chiefly involving Baltimore County, Calvert County and Howard County. It was formerly called Anne Arundel and Providence.
Is my lot in a flood zone?: We do not have flood maps for Anne Arundel County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

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