2022 NAICS national industry in sector 31-33 Manufacturing
326140 Polystyrene Foam Product Manufacturing
NAICS 326140 is the US industry code for polystyrene foam product manufacturing. It covers establishments primarily engaged in manufacturing polystyrene foam products.
- Code
- 326140 (2022 NAICS)
- Title
- Polystyrene Foam Product Manufacturing
- Part of
- Plastics Product Manufacturing
- SBA small business limit
- Up to 1,000 employees
- Closest UK SIC
- 22210, 22220, 22230, 22290 (details)
Changes coming. The NAICS 2027 revision applies to data from 1 January 2027, and SBA proposed new size standards on 20 August 2026. The values on this page are the ones in force today; we update this page when the official files change.
Official definition
This industry comprises establishments primarily engaged in manufacturing polystyrene foam products.
When to use a different code
Census classifies these close-sounding activities somewhere else. Businesses mainly engaged in:
- Establishments primarily engaged in manufacturing plastics foam products (except polystyrene) are classified in Industry 326150, Urethane and Other Foam Product (except Polystyrene) Manufacturing.
Activities listed under 326140
The Census index assigns these 14 activities to this code. If your business matches one, this is your code.
- Coolers or ice chests, polystyrene foam, manufacturing
- Cups, polystyrene foam, manufacturing
- Dinnerware, polystyrene foam, manufacturing
- Foam polystyrene products manufacturing
- Food containers, polystyrene foam, manufacturing
- Ice buckets, polystyrene foam, manufacturing
- Ice chests or coolers, polystyrene foam, manufacturing
- Insulation and cushioning, polystyrene foam plastics, manufacturing
- Jugs, vacuum, polystyrene foam plastics, manufacturing
- Plates, polystyrene foam, manufacturing
- Polystyrene foam packaging manufacturing
- Sheet (i.e., board), polystyrene foam insulation, manufacturing
- Shipping pads and shaped cushioning, polystyrene foam, manufacturing
- Thermal insulation, polystyrene foam, manufacturing
SBA size standard for 326140
To count as a small business for SBA loans and federal contracts under NAICS 326140, your business (including affiliates) must not exceed 1,000 employees. Check your business.
Source: SBA table of size standards, effective March 17, 2023.
Closest UK SIC 2007 codes
There is no official one-to-one link between NAICS and UK SIC. These codes share the same international class (ISIC Rev. 4: 2220), so treat them as a starting point and check the definition.
- 22210Manufacture of plastic plates, sheets, tubes and profilesUK SIC
- 22220Manufacture of plastic packing goodsUK SIC
- 22230Manufacture of builders ware of plasticUK SIC
- 22290Manufacture of other plastic productsUK SIC
Built from Census concordances 2022→2017 NAICS and 2017 NAICS→ISIC Rev. 4.
Similar codes to compare
Data last changed November 14, 2026. How this page is built.