Analysis
NAICS 31621 is the 2022 NAICS industry for footwear manufacturing, part of 3162 (Footwear Manufacturing).
It has only one more detailed code, 316210, which covers exactly the same activities; the definition, index entries and statistics are on that page.
County Business Patterns counts 201 US establishments in this code in 2023, employing 8,781 people at an average annual payroll of $43,534 per employee (11th percentile of national industries). 44% of the establishments have fewer than five employees, which is close to the national mix.
Between 2018 and 2023 the number of establishments fell 8% and employment fell 22%. 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.
Official definition
See industry description for 316210.
Source: US Census Bureau, NAICS 2022 Manual.