Table · dataset · 2025
Loudoun County Boundary
Listed in Virginia Open Data Portal
More Metadata Loudoun County was founded in 1757.
Description
Loudoun's boundary with Maryland is the mean low water mark of the Potomac River on the Virginia side; it has not been surveyed. Loudoun's boundary with Prince William County is the Bull Run Creek.
The border has not been modified for recent surveys. Individual plats along the Potomac and Bull Run Rivers have not resulted in a change in the border along those rivers- since measurements of the waters edge vary seasonally and the County Boundary needs to be seamless and constant. Many decades ago tax commissioners from surrounding jurisdictions assigned parcels to one jurisdiction or another rather than splitting parcels.
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Currently there is a mix of parcels split by a County Boundary, parcels taxed entirely in Loudoun, and portions of parcels within the County but taxed by another jurisdiction. The Office of the Commissioner of the Revenue dictates how these parcels are taxed, as do other jurisdictions. In 1957, the boundary with Fairfax County was re-established and finalized.
The boundary with Fauquier County was surveyed and monumented in 1966. The boundary with Clarke County was surveyed in 1989, and the boundary survey with Jefferson County West Virginia was completed in 1998. The West Virginia, Fairfax, Fauquier, and Clarke boundary arcs were created by generating coverages from the monument coordinates using the generate command.
Links
Get the data
- Publisher page geohub-loudoungis.opendata.arcgis.com/datasets/LoudounGIS::loudoun-county-boundary-1 ↗
documentation · download · from data virginia gov
- ArcGIS GeoService logis.loudoun.gov/gis/rest/services/COL/CountyBoundary/MapServer/0 ↗
download · from data virginia gov
- CSV geohub-loudoungis.opendata.arcgis.com/api/download/v1/items/cd56614ff14f44fb82f50a8baf427125/csv?lay… ↗
download · from data virginia gov
- Shapefile geohub-loudoungis.opendata.arcgis.com/api/download/v1/items/cd56614ff14f44fb82f50a8baf427125/shapefi… ↗
download · from data virginia gov
- GeoJSON geohub-loudoungis.opendata.arcgis.com/api/download/v1/items/cd56614ff14f44fb82f50a8baf427125/geojson… ↗
download · from data virginia gov
- KML geohub-loudoungis.opendata.arcgis.com/api/download/v1/items/cd56614ff14f44fb82f50a8baf427125/kml?lay… ↗
download · from data virginia gov
Where it is published
- Virginia Open Data Portal dataset page data.virginia.gov/dataset/loudoun-county-boundary1 ↗
landing page · from data virginia gov
Catalogue records · 1
- CKAN API data.virginia.gov/api/3/action/package_show?id=222e2e8b-9be6-4fd2-94cf-7838989a8… ↗
metadata API · from data virginia gov
Provenance · 1 source records, 5 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| Virginia Open Data Portal | 222e2e8b-9be6-4fd2-94cf-7838989a8e3f | 2 h ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| created_date | source · data virginia gov | connector:data_virginia_gov@1.0.0 | |
| description | source · data virginia gov | connector:data_virginia_gov@1.0.0 | /notes |
| publication_date | source · data virginia gov | connector:data_virginia_gov@1.0.0 | |
| title | source · data virginia gov | connector:data_virginia_gov@1.0.0 | /title |
| updated_date | source · data virginia gov | connector:data_virginia_gov@1.0.0 |