Commonwealth of Massachusetts · DCJIS
Firearms Open Data Portal
mass.gov/firearms
Previously: published annually as a static PDF and unavailable between reports. Now: updated in real time, with filtering, CSV download, and a public JSON API.
Open Data · Commonwealth of Massachusetts

Firearms data for researchers, press, and the public

Aggregated, de-identified statistics from the Massachusetts Instant Record Check System (MIRCS) and the Department of Criminal Justice Information Services. Every dataset on this portal is also available as CSV and via a public JSON API.

GET /api/public/towns GET /api/public/towns?format=csv
Licenses by town

Active LTC and FID counts, applications per capita, denial rates for each of the 351 Massachusetts municipalities.

351 towns · updated daily
Processing times

Median and 90th-percentile days from application to issuance, by licensing authority.

351 authorities · 12-month trend
Denials & reasonsComing soon

Anonymized statistics on denied applications and the statutory grounds invoked.

Quarterly refresh
FA-10 transactionsComing soon

Volume of private sales, transfers, and surrenders recorded through the FA-10 system.

412k YTD
Dataset updated daily · Licensed under CC BY 4.0
HomeLicenses by townProcessing times/api/public/towns