2022 NAICS national industry in sector 31-33 Manufacturing
311221 Wet Corn Milling and Starch Manufacturing
NAICS 311221 is the US industry code for wet corn milling and starch manufacturing. This U.S.
- Code
- 311221 (2022 NAICS)
- Title
- Wet Corn Milling and Starch Manufacturing
- Part of
- Starch and Vegetable Fats and Oils Manufacturing
- SBA small business limit
- Up to 1,300 employees
- Closest UK SIC
- 10620 (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 U.S. industry comprises establishments primarily engaged in wet milling corn and other vegetables (except to make ethyl alcohol). Examples of products made in these establishments are corn sweeteners, such as glucose, dextrose, and fructose; corn oil; and starches (except laundry).
When to use a different code
Census classifies these close-sounding activities somewhere else. Businesses mainly engaged in:
- Refining and/or blending corn oil from purchased oils are classified in U.S. Industry 311225, Fats and Oils Refining and Blending.
- Manufacturing sweetening syrups from corn syrup and starch base dessert powders are classified in U.S. Industry 311999, All Other Miscellaneous Food Manufacturing.
- Reducing maple sap to maple syrup are classified in U.S. Industry 111998, All Other Miscellaneous Crop Farming.
- Milling (except wet milling) corn are classified in U.S. Industry 311211, Flour Milling.
- Wet milling corn to produce nonpotable ethyl alcohol are classified in U.S. Industry 325193, Ethyl Alcohol Manufacturing.
- Manufacturing laundry starches are classified in U.S. Industry 325612, Polish and Other Sanitation Good Manufacturing.
Activities listed under 311221
The Census index assigns these 28 activities to this code. If your business matches one, this is your code.
- Corn dextrin manufacturing
- Corn gluten feed manufacturing
- Corn gluten meal manufacturing
- Corn oil cake and meal manufacturing
- Corn oil mills
- Corn oil, crude and refined, made by wet milling corn
- Corn starch manufacturing
- Corn sweeteners (e.g., dextrose, fructose, glucose) made by wet milling corn
- Crude corn oil manufacturing
- Dextrin made by wet milling corn
- Gluten feed, flour, and meal, made by wet milling corn
- Gluten manufacturing
- HFCS (high fructose corn syrup) manufacturing
- High fructose corn syrup (HFCS) manufacturing
- Maltodextrins manufacturing
- Margarine and other corn oils made by wet milling corn
- Oil, corn crude and refined, made by wet milling corn
- Potato starches manufacturing
- Rice starches manufacturing
- Root starches manufacturing
- Starches (except laundry) manufacturing
- Steepwater concentrate manufacturing
- Sugar made by wet milling corn
- Syrup, corn, made by wet milling
- Table oil, corn, made by wet milling
- Tapioca manufacturing
- Vegetable starches manufacturing
- Wet milling corn and other vegetables
SBA size standard for 311221
To count as a small business for SBA loans and federal contracts under NAICS 311221, your business (including affiliates) must not exceed 1,300 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: 1040, 1062), so treat them as a starting point and check the definition.
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.