Analysis
NAICS 519 is the 2022 subsector for web search portals, libraries, archives, and other information services, part of 51 (Information).
It has only one more detailed code, 5192, which covers exactly the same activities; the definition, index entries and statistics are on that page.
County Business Patterns counts 13,402 US establishments in this code in 2023, employing 409,184 people at an average annual payroll of $291,284 per employee (100th percentile of national industries). 66% of the establishments have fewer than five employees, which marks it as a small-business industry.
By establishments it ranks 4th of the 4 codes at this level within Information, with 8.3% of them.
Between 2018 and 2023 the number of establishments grew 9% and employment rose 29%. The 2018 count used NAICS 2017, so part of a large move can come from codes being redefined rather than from businesses opening or closing.
Official definition
Industries in the Web Search Portals, Libraries, Archives, and Other Information Services subsector group establishments supplying information, storing and providing access to information, searching and retrieving information, and operating Web sites that use search engines to allow for searching information on the Internet. The main components of the subsector are libraries, archives, and Web search portals.
Source: US Census Bureau, NAICS 2022 Manual.