Analysis
NAICS 3131 is the 2022 industry group for fiber, yarn, and thread mills, part of 313 (Textile Mills).
It has only one more detailed code, 313110, which covers exactly the same activities; the definition, index entries and statistics are on that page.
County Business Patterns counts 250 US establishments in this code in 2023, employing 18,290 people at an average annual payroll of $43,993 per employee (12th percentile of national industries). 38% of the establishments have fewer than five employees, which is close to the national mix.
By establishments it ranks 3rd of the 3 codes at this level within Textile Mills, with 14.7% of them.
Between 2018 and 2023 the number of establishments fell 11% and employment fell 18%. 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.