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How many licensed plumbers are in Massachusetts?
Licensed-supply count from the Massachusetts register, by credential tier and per capita.
As of 2026-08-09, Massachusetts has 24,466 licensed plumbers
on its state register, 5,637 of them at master level.
24,466
licensed plumbers
5,637
master level
349.4
per 100k residents
#1
of 42 states
Massachusetts plumbers by credential tier
Apprentice4,317
Journeyman14,512
Master5,637
How Massachusetts compares
State
Licensed plumbers
Per 100k
Massachusetts
24,466
349.4
Colorado
21,082
358.7
Iowa
18,092
564.1
Massachusetts is part of 324,175 licensed plumbers nationally, and ranks #8 of 42 published states by per-capita density.
Questions
How many licensed plumbers are there in Massachusetts?
As of 2026-08-09, Massachusetts has 24,466 licensed plumbers on its state register, including 5,637 at master level.
How many plumbers per capita does Massachusetts have?
Massachusetts has 349.4 licensed plumbers per 100,000 residents (Census 2023 population).
Is this the same as employment estimates?
No. This is a count of active licenses on the state register, not a BLS survey estimate of employment. Licensed capacity and estimated employment are different numbers.
How often is this updated?
The register is re-pulled and re-judged nightly. Every figure carries its as-of date.
New licenses, ladder upgrades, classification changes and lapses, by market and credential tier. Read the quarterly free, or license the underlying data.