2022 NAICS industry in sector 31-33 Manufacturing
31121 Flour Milling and Malt Manufacturing
NAICS 31121 is the US industry code for flour milling and malt manufacturing. It covers establishments primarily engaged in one or more of the following: (1) milling flour or meal from grains or vegetables; (2) preparing flour mixes or doughs from flour milled in the same establishment; (3) milling, cleaning, and polishing rice; and (4) manufacturing malt from barley, rye, or other grains.
Official definition
This industry comprises establishments primarily engaged in one or more of the following: (1) milling flour or meal from grains or vegetables; (2) preparing flour mixes or doughs from flour milled in the same establishment; (3) milling, cleaning, and polishing rice; and (4) manufacturing malt from barley, rye, or other grains.
When to use a different code
Census classifies these close-sounding activities somewhere else. Businesses mainly engaged in:
- Preparing breakfast cereals from flour milled in the same establishment are classified in Industry 31123, Breakfast Cereal Manufacturing.
- Crushing soybeans or wet milling corn and vegetables are classified in Industry 31122, Starch and Vegetable Fats and Oils Manufacturing.
- Manufacturing prepared flour mixes or doughs from flour ground elsewhere are classified in Industry 31182, Cookie, Cracker, and Pasta Manufacturing.
- Brewing malt beverages are classified in Industry 31212, Breweries.
- Mixing purchased dried and dehydrated ingredients with purchased rice are classified in Industry 31199, All Other Food Manufacturing.
- Drying and/or dehydrating ingredients and packaging them with purchased rice are classified in Industry 31142, Fruit and Vegetable Canning, Pickling, and Drying.
- Manufacturing malt extract and syrups are classified in Industry 31194, Seasoning and Dressing Manufacturing.
Codes in 31121
Data last changed November 14, 2026. How this page is built.