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How many licensed plumbers are in Iowa?
Licensed-supply count from the Iowa register, by credential tier and per capita.
As of 2026-08-09, Iowa has 18,092 licensed plumbers
on its state register.
18,092
licensed plumbers
564.1
per 100k residents
#3
of 42 states
Iowa plumbers by credential tier
Journeyman18,092
How Iowa compares
State
Licensed plumbers
Per 100k
Massachusetts
24,466
349.4
Colorado
21,082
358.7
Iowa
18,092
564.1
Michigan
17,967
179.0
Minnesota
17,925
312.4
Iowa is part of 324,175 licensed plumbers nationally, and ranks #4 of 42 published states by per-capita density.
Questions
How many licensed plumbers are there in Iowa?
As of 2026-08-09, Iowa has 18,092 licensed plumbers on its state register.
How many plumbers per capita does Iowa have?
Iowa has 564.1 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.