The fee for a US visa varies depending on the type of visa and the purpose of your travel
Here are some of the common visa categories and their corresponding fees
Nonimmigrant visa (Visitor visa, Business visa, Student visa, etc.): $160
Treaty Trader/Investor visa: $205
Fiancé(e) visa: $265
Immigrant visa (Family-based, Employment-based, Diversity Visa): $325 - $345
Please note that these fees are subject to change, so it's always a good idea to check the current fee schedule on the website of the US Department of State.
Additionally, there may be additional fees depending on the country from which you are applying, such as a reciprocity fee.