Analysis
NAICS 53121 is the 2022 NAICS industry for offices of real estate agents and brokers, part of 5312 (Offices of Real Estate Agents and Brokers).
It has only one more detailed code, 531210, which covers exactly the same activities; the definition, index entries and statistics are on that page.
Between 2018 and 2023 the number of establishments grew 25% and employment rose 16%. 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.
County Business Patterns counts 163,894 US establishments in this code in 2023, employing 395,264 people at an average annual payroll of $79,090 per employee (67th percentile of national industries). 92% of the establishments have fewer than five employees, which marks it as a small-business industry.
Official definition
See industry description for 531210.
Source: US Census Bureau, NAICS 2022 Manual.