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How many licensed plumbers are in Maryland?
Licensed-supply count from the Maryland register, by credential tier and per capita.
As of 2026-08-09, Maryland has 6,521 licensed plumbers
on its state register, 24 of them at master level.
6,521
licensed plumbers
24
master level
105.5
per 100k residents
#20
of 42 states
Maryland plumbers by credential tier
Apprentice3,210
Journeyman3,274
Master24
Inspector13
How Maryland compares
State
Licensed plumbers
Per 100k
Oklahoma
6,985
172.3
New Jersey
6,931
74.6
Maryland
6,521
105.5
Oregon
6,346
149.9
Kentucky
6,298
139.1
Maryland is part of 324,175 licensed plumbers nationally, and ranks #28 of 42 published states by per-capita density.
Questions
How many licensed plumbers are there in Maryland?
As of 2026-08-09, Maryland has 6,521 licensed plumbers on its state register, including 24 at master level.
How many plumbers per capita does Maryland have?
Maryland has 105.5 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.