Arlington Open Data Policy & API Access

Technology and Data Virginia 3 Minutes Read ยท published February 10, 2026 Flag of Virginia

Arlington, Virginia publishes municipal datasets and programmatic endpoints through an official open data portal to improve transparency and civic technology use. This guide explains where to find datasets, how to call APIs, who to contact for access or bulk requests, and the administrative policy framework that governs reuse of Arlington data. Follow the steps below to discover data, retrieve it programmatically, and report issues to the county team.

Accessing the Open Data Portal

The official Arlington open data portal hosts downloadable datasets, maps, and metadata. Each dataset page exposes an API endpoint and machine-readable formats for direct access; see the portal homepage for search and dataset listings [1] and the API documentation for developer endpoints [2].

Use the portal search and the dataset "API" link to copy the dataset endpoint quickly.
  • Find datasets by keyword or category on the portal homepage.[1]
  • Open a dataset page to view fields, sample records, and the JSON/CSV export links.[1]
  • Most datasets are provided free for reuse; check the dataset metadata and policy pages for any license notes.[3]

Technical Access and API Use

Programmatic access is provided via standard dataset API endpoints. Use query parameters on dataset endpoints to filter, sort, and limit results. For batch downloads, use the CSV/GeoJSON export links shown on each dataset page or call the API endpoint directly. Consult the portal API docs for available query parameters, authentication options, and examples.[2]

Penalties & Enforcement

The Arlington open data materials and portal are governed by the county's open data policy and terms of use. Specific monetary fines or penalties for misuse of the open data portal are not specified on the cited pages; see the policy and program pages for enforcement statements and contact paths.[3]

If you plan automated or bulk harvesting, notify the open data team in advance when required by policy.
  • Fine amounts: not specified on the cited page.[3]
  • Escalation (first/repeat/continuing offences): not specified on the cited page.[3]
  • Non-monetary sanctions: suspension or termination of programmatic access or API keys may be administered per policy; details are not fully specified on the cited page.[3]
  • Enforcer and contact: Arlington County open data program and Information Technology department handle access and complaints; use the official contact pages to report issues.[3]
  • Appeal/review routes and time limits: not specified on the cited page; contact the county program for procedures and deadlines.[3]

Applications & Forms

No dedicated public form is required to browse or download published datasets; for bulk access, special feeds, or permissions, contact the Arlington open data team or IT department as listed below. If a formal application is required for elevated access that is not published, it is not specified on the cited pages.[3]

How-To

  1. Open the Arlington open data portal and search for the dataset you need. [1]
  2. On the dataset page, locate the API or Export links (JSON, CSV, GeoJSON) and copy the endpoint URL. [2]
  3. Use standard HTTP GET requests with query parameters to filter or limit results; download CSV or GeoJSON for bulk use. [2]
  4. If you need higher limits or a dedicated feed, contact the open data program or IT department to request access or an app token; the request process details are not specified on the cited pages. [3]
Document the dataset ID and endpoint URL before integrating it into applications.

FAQ

How do I find the API endpoint for a dataset?
Open the dataset page on the Arlington portal and use the "API" or "Export" link to copy the endpoint URL.[1]
Are there rate limits or API keys required?
Rate limits and key requirements are described in the portal API documentation; specific limits or key issuance procedures are not specified on the county policy pages.[2][3]
How do I request a dataset that is not published?
Contact the Arlington open data program or the department that holds the records; use the official contact pages listed in Help and Support / Resources below.[3]

Key Takeaways

  • Arlington provides an official open data portal with dataset pages and API endpoints.[1]
  • Use dataset "API" and export links for programmatic access; contact the open data team for bulk needs.[2]

Help and Support / Resources

  1. [1] Arlington Open Data Portal
  2. [2] Arlington Open Data API documentation
  3. [3] Arlington Open Data policy and program page

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