I referenced World Wide Intelligence (and defense) Agencies as a list of intelligence agencies, but looking at it later, it appears to be a bit “lite.”
There are one hundred and forty-five (145) agencies by my count.
I think what captured my attention is that there are no intelligence agencies for Latin or South America. Come to think of it, there are no intelligence agencies for Africa as well.
Whereas, the List of Intelligence Agencies (Wikipedia) gives a rough count of six hundred and sixty-four (664) intelligence/signal agencies.
The advantage of the World Wide Intelligence (and defense) Agencies list is that it has URLs for the agencies themselves.
The larger Wikipedia list has links to other Wikipedia pages. Useful I suppose for the social engineering required for hacking a security service but not useful as a quick list of URLs for intelligence agencies.
The Federation of American Scientists (FAS) maintains a set of webpages that start with World Intelligence and Security Agencies. Organized by country and below the country pages, the amount of details varies. Pages have been updated unevenly and should be checked before relying on the information you find.
The Crypto Museum also maintains a list of intelligence
organizations.
None of the lists appear to be “complete.”
I didn’t see any listing for the fifty (50) state police organizations in the United States. Nor any for major cities, such as Chicago which operates its own gulag.
I haven’t looked on the “Dark Web” but I assume useful lists there are fairly expensive.
Enjoy!