Analysis
NAICS 4831 is the 2022 industry group for deep sea, coastal, and great lakes water transportation, part of 483 (Water Transportation).
It has only one more detailed code, 48311, which covers exactly the same activities; the definition, index entries and statistics are on that page.
County Business Patterns counts 1,098 US establishments in this code in 2023, employing 41,670 people at an average annual payroll of $116,593 per employee (90th percentile of national industries). 58% of the establishments have fewer than five employees, which is close to the national mix.
By establishments it ranks 1st of the 2 codes at this level within Water Transportation, with 61.3% of them.
Between 2018 and 2023 the number of establishments grew 5% and employment fell 1%. The 2018 count used NAICS 2017, so part of a large move can come from codes being redefined rather than from businesses opening or closing.