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How many licensed plumbers are in Illinois?
Licensed-supply count from the Illinois register, by credential tier and per capita.
As of 2026-08-09, Illinois has 15,751 licensed plumbers
on its state register.
15,751
licensed plumbers
125.5
per 100k residents
#7
of 42 states
Illinois plumbers by credential tier
Apprentice3,949
Journeyman8,524
Contractor3,013
Inspector265
How Illinois compares
State
Licensed plumbers
Per 100k
Minnesota
17,925
312.4
Maine
16,869
1208.6
Illinois
15,751
125.5
California
14,076
36.1
Indiana
12,526
182.5
Illinois is part of 324,175 licensed plumbers nationally, and ranks #27 of 42 published states by per-capita density.
Questions
How many licensed plumbers are there in Illinois?
As of 2026-08-09, Illinois has 15,751 licensed plumbers on its state register.
How many plumbers per capita does Illinois have?
Illinois has 125.5 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.