Upvote:3
Kashmir is not a country in and of itself. There is no entity authorized to issue Kashmir passports, nor is there any such thing as a Kashmir 'citizen'. At the moment, the total area inhabited by peoples who might identify themselves as "Kashmiri" are parts of Pakistan, India and the People's Republic of China.
Were a person of Kashmiri descent decide to want to come to the US, what they needed for that visit would depend on which of those three countries they are actually a citizen of and have a passport issued by.