Can i marry my girlfriend in the US if i enter with a tourist visa?

of course you can marry, whether you can stay afterwards is a different question. it will partially depend on whether she's an American citizen or not. but your tourist visa has nothing to do with your marital status.but of course first you need the tourist visa.

Sure you can get married while visiting the U.S. That's perfectly legal.

What would make it highly illegal, and immigration fraud, would be to enter the United States with a non-immigrant visa, such as a visitor's visa, and the intent to get married and to immigrate (on that very trip).

Hence, once you got married, your wife will have to file an I-130 petition for you, and you'll have to return to the Philippines before your I-94 expires. About 2 to 3 months after you do that, you'll have your interview at the U.S. consulate in Manila and they will issue you an immigrant visa to the United States.

Ah, you're "information shopping." You didn't like what you read, so you're asking for more favorable results. Well, I'm with Brother- getting married is legal. Entering the country with the intent of marrying and not leaving- that's illegal. If you marry, you should anticipate returning to process your immigrant vsa. You can always ask CIS to adjust your status from B-2 to CR-1, but there is no guarantee that you will be allowed to process in the US. ... Best of luck!!