2 counties indexed. ArcGIS FeatureServer and MapServer URLs, with supported search fields per layer.
| County | Endpoints | Searchable fields | Status | Action |
|---|---|---|---|---|
| East Baton Rouge Parish County | 1 | Assessment Number (Parcel ID) · Property Number · Owner Name +1 | LIVE | OPEN |
| Orleans Parish County | 1 | Parcel ID · Tax Bill ID · Owner Name 1 +2 | LIVE | OPEN |
Louisiana is divided into 64 parishes, not counties — write 'parish' consistently when referring to Louisiana's primary civil divisions. Each parish has an elected Assessor who administers property valuation independently. The Louisiana Tax Commission oversees assessment standards and equalization statewide but does not maintain a centralized parcel REST service. Two of the most prominent parishes in the atlas reflect Louisiana's two dominant administrative models: East Baton Rouge Parish (a consolidated city-parish government that operates EBRGIS, one of the state's most capable public GIS programs) and Orleans Parish (New Orleans, which uses a Square/Lot identification system rooted in French-influenced survey conventions rather than the township-range system common elsewhere in the US).
The Louisiana Geographic Information Center (LaGIC), established in 1998 and hosted at Louisiana State University, serves as the state GIS data clearinghouse in coordination with the Louisiana GIS Council (LGISC) and the Office of Technology Services. LaGIC facilitates data sharing among state agencies, parishes, and federal entities, but does not operate a live federated parcel REST endpoint for all 64 parishes. The Louisiana Division of Administration, Office of State Lands, maintains statewide GIS datasets. For property records, qpublic.net/la/laassessors provides a consolidated entry to individual parish assessor portals. On the document side, eClerks LA (eclerksla.com) covers conveyance and mortgage records across all 64 parishes. Direct ArcGIS REST endpoints exist for tech-forward parishes like East Baton Rouge and Orleans but must be discovered individually for the remaining parishes.
Louisiana replaced county with parish as the primary civil division upon statehood in 1812, following French and Spanish colonial administrative structures. Elected Assessors operate at the parish level. FIPS codes for Louisiana follow the county-equivalent convention (East Baton Rouge Parish is FIPS 22033, Orleans Parish is 22071), but the legal name and everyday usage is always parish. In REST query results, field values like SUBDIVISION and WARD_SECTION reflect parish-internal subdivisions that do not map to county-equivalent concepts in other states. Avoid writing 'East Baton Rouge County' or 'Orleans County' in any data pipeline or user-facing label.
New Orleans parcels are identified by the Square/Lot system inherited from French arpent survey conventions. A 'square' is a city block or irregular block fragment bounded by streets; 'lot' is the individual parcel within that square. The SQUARE and LOT fields appear in the Orleans Parish REST layer (apps/property3/MapServer/15), alongside PARCELID and TAXBILLID. TAXBILLID is what appears on tax bills and is the more reliable cross-reference for research that starts from assessment records. PARID (Parcel Account ID) is the assessor's internal identifier. SITEADDRESS is the civic address. The SQUARE field contains numeric values, not street intersection names. This system means that a lot description like 'Square 123, Lot 4' has no equivalent in the township-range or lot-block-subdivision formats used in most other US jurisdictions.
East Baton Rouge Parish parcels carry a WARD_SECTION field that reflects the ward and section subdivision used historically in Louisiana assessment administration. This is distinct from street addresses or ZIP codes — it encodes an internal assessor geography for organizing appraisal districts. The SUM_FAIR_MARKET_VALUE and SUM_ASSESSED_VALUE fields in the EBRGIS layer carry the total parcel fair market and assessed values. Louisiana assesses residential property at 10% of fair market value (for homestead-eligible parcels) and commercial property at a higher fraction under state statute. SUM_LOT_VALUE, SUM_LAND_VALUE, and SUM_IMPROVEMENT_VALUE break value into components. SUM_HOMESTEAD_EXEMPTION records the homestead exemption applied — Louisiana's homestead exemption reduces assessed value by up to $7,500 for eligible owner-occupants.
East Baton Rouge Parish (Baton Rouge, state capital, pop. ~456,000; consolidated city-parish). EBRGIS Tax Parcel MapServer at maps.brla.gov exposes ASSESSMENT_NUM, OWNER, OWNER_ADDRESS, PHYSICAL_ADDRESS, WARD_SECTION, SUBDIVISION, SUM_FAIR_MARKET_VALUE, SUM_ASSESSED_VALUE, and homestead exemption fields. Owner-name queries confirmed live. Open data portal at web-ebrgis.opendata.arcgis.com.
Orleans Parish (New Orleans, pop. ~383,000; consolidated city-parish). Property Information layer at gis.nola.gov (apps/property3/MapServer/15) exposes OWNERNME1, SITEADDRESS, TAXBILLID, PARCELID, SQUARE, LOT, BLOCK, and PARID. Uses Square/Lot parcel identification. Owner queries confirmed live. Open data portal at portal-nolagis.opendata.arcgis.com.
East Baton Rouge owner search: ?where=UPPER(OWNER)+LIKE+UPPER('%25SMITH%25')&outFields=ASSESSMENT_NUM,OWNER,OWNER_ADDRESS,PHYSICAL_ADDRESS,SUBDIVISION,SUM_FAIR_MARKET_VALUE&returnGeometry=false&f=json&resultRecordCount=10 (base: maps.brla.gov/gis/rest/services/Cadastral/Tax_Parcel/MapServer/0). Assessment number lookup: ?where=ASSESSMENT_NUM='<value>'&outFields=*&returnGeometry=false&f=json. Orleans Parish owner search: ?where=UPPER(OWNERNME1)+LIKE+UPPER('%25SMITH%25')&outFields=PARCELID,OWNERNME1,SITEADDRESS,TAXBILLID,SQUARE,LOT&returnGeometry=false&f=json&resultRecordCount=10 (base: gis.nola.gov/arcgis/rest/services/apps/property3/MapServer/15). Orleans tax bill lookup: ?where=TAXBILLID='<value>'&outFields=*&returnGeometry=false&f=json.
Last updated 2026-05-24.
2 Louisiana parishes are indexed in the UrbanKit atlas with verified public REST endpoints: East Baton Rouge Parish and Orleans Parish. Each exposes an owner-name field you can search directly on the public layer.
East Baton Rouge Parish and Orleans Parish expose an owner-name field on the public REST layer. East Baton Rouge Parish, for example, uses the OWNER field — a case-insensitive search is ?where=UPPER(OWNER)%20LIKE%20UPPER('%25SMITH%25')&outFields=*&f=json. Open a parish's page here for its full field list and a ready-to-run sample query.
East Baton Rouge Parish publishes parcels at https://maps.brla.gov/gis/rest/services/Cadastral/Tax_Parcel/MapServer/0 — a MapServer (layer 0). It indexes by Assessment Number (Parcel ID), Property Number, Owner Name, and Physical Address. Owner-name search: UPPER(OWNER) LIKE UPPER('%25SMITH%25').
Louisiana's indexed parishes (East Baton Rouge Parish and Orleans Parish) publish county-hosted ArcGIS MapServer layers. MapServer supports the same /query operation for owner, parcel-ID, and address lookups as FeatureServer — for read-only parcel lookups the two are interchangeable.
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