> Enrich.chat gives AI agents verified work emails and mobiles. To use it from an agent, read https://enrich.chat/agents.md . This is the Markdown version of https://enrich.chat/naics/519210/ # NAICS code 519210: Libraries and Archives The companies classified under NAICS 519210, where they are based, how big they are and how the code maps to SIC. By Enrich.chat Editorial. Updated October 22, 2026. **Short answer:** NAICS 519210 is the code for Libraries and Archives, in sector 51: Information. The companies counted under it are mostly very small: 60% have 50 or fewer employees, and 88% are headquartered in the United States. ## What is NAICS 519210? NAICS 519210 is the code for Libraries and Archives. It belongs to sector 51: Information. NAICS, the North American Industry Classification System, is the standard U.S. government agencies use to sort businesses by what they mainly do, and each digit narrows the category. Most of the companies counted also carry SIC 8231, Library, in the older SIC system (91%). - 60% of the companies counted have 50 or fewer employees, and the middle one is in the 11 to 50 range. - The largest group is headquartered in the United States (88%). Within the US, New York is the biggest state (17%). - Most were founded in the before 1960 (61%), then the 1960s (9%). **Figure: How NAICS 519210 is built.** The code 519210 split into its parts: sector 51, then subsector, industry group, NAICS industry and U.S. industry. *The six digits of NAICS 519210. Each digit narrows the category.* ## Which companies are classified under NAICS 519210? The biggest by headcount range include Cornell University, City of Toronto, Derby City Council, East Riding Of Yorkshire Council and North Lanarkshire Council. Names link to a company profile where we have one. | Company | Headquarters | Employees | | --- | --- | --- | | [Cornell University](https://enrich.chat/company/cornell-university/) | Ithaca, NY | 10,001+ | | [City of Toronto](https://enrich.chat/company/city-of-toronto/) | Toronto, Canada | 10,001+ | | East Riding Of Yorkshire Council | Beverley, United Kingdom | 10,001+ | | North Lanarkshire Council | Motherwell, United Kingdom | 10,001+ | | Medway Council | Chatham, United Kingdom | 5,001 to 10,000 | | The University Of Memphis | Memphis, TN | 1,001 to 5,000 | | Brooklyn Public Library | Brooklyn, NY | 1,001 to 5,000 | | London Borough Of Bexley | London, United Kingdom | 1,001 to 5,000 | | London Borough Of Havering | London, United Kingdom | 1,001 to 5,000 | | City Of Santa Ana | Santa Ana, United States | 1,001 to 5,000 | | Redcar & Cleveland Borough Council | Redcar, United Kingdom | 1,001 to 5,000 | | East Ayrshire Council | Kilmarnock, United Kingdom | 1,001 to 5,000 | | Calgary Public Library | Calgary, Canada | 501 to 1,000 | | London Borough Of Sutton | London, United Kingdom | 501 to 1,000 | | Columbus Metropolitan Library | Columbus, OH | 501 to 1,000 | | Las Vegas-Clark County Library District | Las Vegas, United States | 501 to 1,000 | | Cuyahoga County Public Library | Parma, OH | 501 to 1,000 | | Wabash College | Crawfordsville, IN | 201 to 500 | | National Museums Liverpool | Liverpool, United Kingdom | 201 to 500 | | Walla Walla University | College Place, WA | 201 to 500 | | Toledo Lucas County Public Library | Toledo, OH | 201 to 500 | | Rushmoor Borough Council | Farnborough, United Kingdom | 201 to 500 | | Tulsa City-County Library | Tulsa, United States | 201 to 500 | | Vaughan Public Libraries | Vaughan, Canada | 201 to 500 | | Gedling Borough Council | Arnold, United Kingdom | 201 to 500 | The table shows the 25 biggest by headcount range, with ties broken by audience size. The charts and percentages below cover every company counted for this page, not just these 25, and companies with fewer than 11 employees are not counted. Headquarters is the location on each company's public profile. ## Where are NAICS 519210 companies based? The largest groups are headquartered in the United States (88%), the United Kingdom (7%) and Canada (3%). **Figure: Where companies in NAICS 519210 are based.** Bars for the share of counted companies in NAICS 519210 headquartered in each country: United States 88%, United Kingdom 7%, Canada 3%. *Share of counted companies in NAICS 519210 by headquarters country.* Within the United States, New York (17%), Ohio (11%) and Illinois (9%) lead. **Figure: US headquarters of companies in NAICS 519210, by state.** A tile map of the United States shaded by the share of counted US companies in NAICS 519210 headquartered in each state. The largest are New York 17%, Ohio 11%, Illinois 9%. *Share of counted US companies in NAICS 519210 by headquarters state. The three largest states are outlined.* ## How big are the companies counted for NAICS 519210? 60% of them have 50 or fewer employees, and the middle one is in the 11 to 50 range. Companies with fewer than 11 employees are not counted. **Figure: Size of companies in NAICS 519210.** Seven columns for the share of counted companies in NAICS 519210 in each employee range: 11 to 50 60%, 51 to 200 23%, 201 to 500 8%, 501 to 1,000 3%, 1,001 to 5,000 3%, 5,001 to 10,000 0%, 10,001+ 2%. *Share of counted companies in NAICS 519210 in each employee range.* ## How old are NAICS 519210 companies? Most were founded in the before 1960 (61%), then the 1960s (9%). **Figure: When companies in NAICS 519210 were founded.** Eight columns for the share of counted companies in NAICS 519210 founded in each era: Before 1960 61%, 1960s 9%, 1970s 7%, 1980s 5%, 1990s 9%, 2000s 6%, 2010s 4%, 2020s 0%. *Share of counted companies in NAICS 519210 by the era they were founded in, for the ones that list a founding year.* ## How NAICS 519210 compares - 4% were founded in 2010 or later, against 30% across all NAICS codes on this site. - Ohio holds 11% of the US companies here, against 3% across all NAICS codes on this site. ## How do NAICS 519210 companies describe themselves? A code is assigned by classification, and a company does not choose its own, so the label a company uses for itself can differ. The most common labels here are Libraries (72%), Government Administration (13%) and Non-profit Organizations (5%). **Figure: How companies in NAICS 519210 describe themselves.** Bars for the share of counted companies in NAICS 519210 that give each industry on their public profile: Libraries 72%, Government Administration 13%, Non-profit Organizations 5%. *Share of counted companies in NAICS 519210 by the industry they list on their public profile.* ## NAICS 519210 and the SIC system NAICS replaced SIC in 1997, but the two do not line up one to one: companies filed under one NAICS code can carry several SIC codes. These are the ones seen most. | Code | Title | Share of counted | | --- | --- | --- | | SIC 8231 | Library | 91% | | SIC 9199 | General government | 3% | ## Where NAICS codes come from NAICS is maintained by the U.S. Census Bureau with Canada and Mexico and revised every five years; the current edition is NAICS 2022. To check exactly what a code includes, search the [official NAICS index](https://www.census.gov/naics/) or read the Census Bureau's [guide to understanding NAICS](https://www.census.gov/programs-surveys/economic-census/year/2022/guidance/understanding-naics.html). Pick a code by what a company mostly does, not by who it sells to. ## How do you reach the people at NAICS 519210 companies? The people to talk to are usually product, engineering and revenue leaders. You can build the list from this code in three prompts to your AI agent. ### 1. Count them (free) Counting who matches never uses credits. ```text Use www.enrich.chat to count the companies with NAICS code 519210 (Libraries and Archives) ``` ### 2. Find the people (5 credits per person) Name the roles you sell to. Each person returned is 5 credits, and name, title and company are included. ```text Use www.enrich.chat to find the product, engineering and revenue leaders at companies with NAICS code 519210, with their titles ``` ### 3. Get their work emails (10 credits each) An email is 10 credits only when one is found. Every email comes with a status: verified, catch-all or unknown. ```text Use www.enrich.chat to find the work emails for these people and tell me which ones are verified ``` ## More to explore Others in sector 51: [NAICS 513210: Software Publishers](https://enrich.chat/naics/513210/)[NAICS 517810: All Other Telecommunications](https://enrich.chat/naics/517810/)[NAICS 518210: Computing Infrastructure Providers, Data](https://enrich.chat/naics/518210/)[NAICS 517112: Wireless Telecommunications Carriers](https://enrich.chat/naics/517112/)[NAICS 513110: Newspaper Publishers](https://enrich.chat/naics/513110/)[NAICS 513130: Book Publishers](https://enrich.chat/naics/513130/)[NAICS 513120: Periodical Publishers](https://enrich.chat/naics/513120/)[NAICS 516120: Television Broadcasting Stations](https://enrich.chat/naics/516120/) ## Frequently asked questions ### What is NAICS code 519210? NAICS 519210 is the code for Libraries and Archives, in sector 51: Information. ### What is the SIC code for NAICS 519210 (Libraries and Archives)? 91% of the companies counted carry SIC 8231 (Library), but the two systems do not map one to one. ### Which companies are classified under NAICS 519210? The biggest by headcount range include Cornell University, City of Toronto, Derby City Council, East Riding Of Yorkshire Council and North Lanarkshire Council. The page lists 25 with links to their profiles where we have them. ### Where are NAICS 519210 companies based? The largest groups are headquartered in the United States (88%), the United Kingdom (7%) and Canada (3%). ### How big are the companies in NAICS 519210? 60% have 50 or fewer employees, and the middle one is in the 11 to 50 range. Companies with fewer than 11 employees are not counted. ### Is NAICS 519210 the same as a SIC code? No. NAICS replaced SIC as the U.S. federal standard in 1997, and the two do not map one to one. The SIC code seen most among these companies is 8231. ## Try this prompt Find the people at NAICS 519210 companies ```text Use www.enrich.chat to find the product, engineering and revenue leaders at companies with NAICS code 519210, with titles and verified work emails ``` ## Related - [Companies using a technology](https://enrich.chat/companies-using/) - [Tech stack lookup](https://enrich.chat/tools/tech-stack-lookup/)