The number of logical fallacies is not fixed as there are many types, often categorized in different ways. Commonly recognized logical fallacies range from about 15 widely known types to dozens or even over a hundred if including less common and more specific ones. For example, some common types include red herring, bandwagon, straw man, slippery slope, and hasty generalization, among others, with detailed lists often featuring 15-30 primary fallacies and extended lists containing many more.

In essence, logical fallacies number in the dozens and can be broadly divided into informal and formal categories, encompassing a wide array of flawed reasoning patterns.

If needed, a more specific number or commonly accepted list can be provided based on popular or academic sources.