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  • Debated.

The question needs to be more defined as to what time period the question refers to. The answer is never dealt with in the show. One of the writers/producers theorised that based on the lowest and highest registries shown in TNG that Starfleet during TNG had around 30,000 ships.

Given the Federation is across 8,000 light years and the limits of warp drive you would expect that Starfleet would need thousands of ships to adequately defend and maintain security in the Federation since Starfleet isn't just a military, it is the exploratory arm and police and custom force.

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