County · code 42073
Lawrence CountyPennsylvania
Lawrence County is in Pennsylvania and was created in 1849 from Beaver and Mercer Counties. The county seat is New Castle.
- Founded1849
- County seatNew Castle
- Named forUSS Lawrence
- Land area357 sq mi + 4.4 sq mi water
- Population86,070 2020 Census
- Parcels mapped58,733 checked 16 October 2026
Where it is
Lawrence on the map of Pennsylvania
Pennsylvania has 67 counties and county equivalents, each with its own records office. Shapes with a page are links.
History
Formed in 1849 from Beaver County and Mercer County
An old deed may name a county that no longer exists, or a boundary that has since moved.
Lawrence County was named after Uss Lawrence.
- 1849Lawrence County created Lawrence created from Beaver and Mercer. · Pa. Laws 1849, no. 366, secs. 1-2/pp. 551-552
Land and parcels
What the maps cover in Lawrence
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 58,733 parcels from Lawrence County. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
checked 16 October 2026 -
Address points Missing
No public address points layer found for Lawrence County yet.
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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
Lawrence 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.
Permits
County government
- County government
The official website of Lawrence County.
See your own lot on these maps
Open Lawrence 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 Lawrence County
- When was Lawrence County founded?
- Lawrence County was founded in 1849, formed from Beaver County and Mercer County, and named after USS Lawrence.
- What is the county seat of Lawrence County?
- The county seat of Lawrence County is New Castle.
- Is there an online parcel map for Lawrence County?
- Yes. Lawrence County publishes a parcel map of 58,733 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Lawrence County's boundary or name changed?
- Lawrence County was created in 1849 from Beaver County and Mercer County. The Atlas of Historical County Boundaries records no boundary change since.
- Who issues building permits in Lawrence County?
- The county's page on building permits: Firearm Carry Permit. Inside a city or town, ask that city first.
- Is my lot in a flood zone?
- We do not have flood maps for Lawrence County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby