Analysis
NAICS 92511 is the 2022 NAICS industry for administration of housing programs, part of 9251 (Administration of Housing Programs, Urban Planning, and Community Development).
It has only one more detailed code, 925110, which covers exactly the same activities; the definition, index entries and statistics are on that page.
County Business Patterns excludes public administration, so there is no establishment count for it.
Official definition
See industry description for 925110.
Source: US Census Bureau, NAICS 2022 Manual.