# NAICS code 31-33: Manufacturing NAICS 31-33 is Manufacturing, a sector in the NAICS 2022 classification. The Manufacturing sector comprises establishments engaged in the mechanical, physical, or chemical transformation of materials, substances, or components into new products. 21 codes sit directly under it, covering 346 six-digit national industries. Census index examples include Animal feed mills, dog and cat, manufacturing; Animal feeds, prepared, dog and cat, manufacturing; Alfalfa meal, dehydrated, manufacturing.Source: NAICS 2022 (Census), 13 CFR 121.201 (eCFR, as of 2026-11-01).Official source: [U.S. Census Bureau NAICS](https://www.census.gov/naics/) | Code | 31-33 | | --- | --- | | Title | Manufacturing | | Level | Sector (2-digit) | | Codes under it | 21 | | Six-digit industries under it | 346 | ## Definition The Manufacturing sector comprises establishments engaged in the mechanical, physical, or chemical transformation of materials, substances, or components into new products. The assembling of component parts of manufactured products is considered manufacturing, except in cases where the activity is appropriately classified in Sector 23, Construction. ## Examples classified under 31-33 - Animal feed mills, dog and cat, manufacturing - Animal feeds, prepared, dog and cat, manufacturing - Alfalfa meal, dehydrated, manufacturing - Alfalfa prepared as feed for animals - Barley flour manufacturing - Batters, prepared, made in flour mills - Bran and other residues of milling rice - Brewers' rice manufacturingFrom the Census NAICS 2022 index file. ## Codes under 31-33 | Code | Title | Size standard | | --- | --- | --- | | [311](https://samgovapi.io/naics/311) | [Food Manufacturing](https://samgovapi.io/naics/311) | - | | [312](https://samgovapi.io/naics/312) | [Beverage and Tobacco Product Manufacturing](https://samgovapi.io/naics/312) | - | | [313](https://samgovapi.io/naics/313) | [Textile Mills](https://samgovapi.io/naics/313) | - | | [314](https://samgovapi.io/naics/314) | [Textile Product Mills](https://samgovapi.io/naics/314) | - | | [315](https://samgovapi.io/naics/315) | [Apparel Manufacturing](https://samgovapi.io/naics/315) | - | | [316](https://samgovapi.io/naics/316) | [Leather and Allied Product Manufacturing](https://samgovapi.io/naics/316) | - | | [321](https://samgovapi.io/naics/321) | [Wood Product Manufacturing](https://samgovapi.io/naics/321) | - | | [322](https://samgovapi.io/naics/322) | [Paper Manufacturing](https://samgovapi.io/naics/322) | - | | [323](https://samgovapi.io/naics/323) | [Printing and Related Support Activities](https://samgovapi.io/naics/323) | - | | [324](https://samgovapi.io/naics/324) | [Petroleum and Coal Products Manufacturing](https://samgovapi.io/naics/324) | - | | [325](https://samgovapi.io/naics/325) | [Chemical Manufacturing](https://samgovapi.io/naics/325) | - | | [326](https://samgovapi.io/naics/326) | [Plastics and Rubber Products Manufacturing](https://samgovapi.io/naics/326) | - | | [327](https://samgovapi.io/naics/327) | [Nonmetallic Mineral Product Manufacturing](https://samgovapi.io/naics/327) | - | | [331](https://samgovapi.io/naics/331) | [Primary Metal Manufacturing](https://samgovapi.io/naics/331) | - | | [332](https://samgovapi.io/naics/332) | [Fabricated Metal Product Manufacturing](https://samgovapi.io/naics/332) | - | | [333](https://samgovapi.io/naics/333) | [Machinery Manufacturing](https://samgovapi.io/naics/333) | - | | [334](https://samgovapi.io/naics/334) | [Computer and Electronic Product Manufacturing](https://samgovapi.io/naics/334) | - | | [335](https://samgovapi.io/naics/335) | [Electrical Equipment, Appliance, and Component Manufacturing](https://samgovapi.io/naics/335) | - | | [336](https://samgovapi.io/naics/336) | [Transportation Equipment Manufacturing](https://samgovapi.io/naics/336) | - | | [337](https://samgovapi.io/naics/337) | [Furniture and Related Product Manufacturing](https://samgovapi.io/naics/337) | - | | [339](https://samgovapi.io/naics/339) | [Miscellaneous Manufacturing](https://samgovapi.io/naics/339) | - | ## Get this as JSON ``` curl "https://samgovapi.io/api/v1/naics/31-33" \ -H "Authorization: Bearer sg_YOUR_KEY" ``` MCP tool: `naics_lookup`Returns the code, size standard and federal activity. Opportunities in this code: /opportunities?q=&active=true&naics=31-33. [Get a free API key](https://samgovapi.io/sign-up) or read the [docs](https://samgovapi.io/docs). ## Questions What is NAICS code 31-33?NAICS 31-33 is Manufacturing, a sector in the NAICS 2022 classification. The Manufacturing sector comprises establishments engaged in the mechanical, physical, or chemical transformation of materials, substances, or components into new products.What codes are under NAICS 31-33?21 codes sit directly under 31-33: 311 Food Manufacturing; 312 Beverage and Tobacco Product Manufacturing; 313 Textile Mills; 314 Textile Product Mills; 315 Apparel Manufacturing; 316 Leather and Allied Product Manufacturing; and more. ## Related - [NAICS code lookup](https://samgovapi.io/naics-code-lookup) - [Size standard checker](https://samgovapi.io/size-standard-checker) - [Opportunity search](https://samgovapi.io/opportunity-search)Independent. 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