Well, you have the Border Grill in Mandalay Bay.

Diego's in MGM.

Diablo's, which is outside the Monte Carlo.

Gonzalez y Gonzalez in New York, New York.

Mesa Grill in Caesars Palace (though it's more Southwestern than Mexican)

The (Something) Cantina in the Venetian shopping area.

That's all I can think of right now, but there are plenty of Mexican places in and around the strip.

Well on the Vegas strip there is a place called La Salsa at Cesars Palace, very nice and yummy. I have never been to this place, but it's at The Hard Rock and it's called Pink Taco, it's supposed to be one of the best. One of my favorite places to eat Mexican food on the trip is this place (I cant remember the name) but it's at the Venetian. It's the only Mexican place there. It's nice because you can sit by the water and the "gondollas" (I think you spell it like that lol) and their food is very authentic (queso fundido for the appetizer is yummy) plus, the prices there are reasonable, not like cheap, but not overpriced like most places on the strip. Oh, and my mom says their Sangria is good lol it's has fruit in it and it's homeade = ) Have fun

Macayo Vegas has 4 different locations around Vegas and claim to have the best Margaritas.

La Cocina Mexicana, Mama Maria's Mexican Restaurant & Takeria Puebla are all other possible restaurants for you.

Hope that helps out!

-Dex

Richardo's!