Can A U.S. Citizen Legally Marry An Illegal Alien In The U.S.?

Marrying an illegal alien doesn't confer citizenship or legal status on him/her, and in fact there could be penalties for doing  this. There can also be a long and difficult procedure in trying to gain legal status - thisarticle may give some pointers. There is also a website called:

Immigrate2us.net

which tries to help with free advice, though the people who run it aren't lawyers.

Yes you can marry them legally.  Everything about your marriage will be legal but like wordy said, that doesn't mean your other half will be a citizen automatically. The laws keep on changing and i think they wound have to wait for several years before they can get their green card then go for an interview for their citizenship.

Why don't you write to the department of naturalization and ask them They would be more qualified to answer that question than anyone else.
Further, an illegal alien has broken the American law system. There are people who have studied and worked their butts of to become American citizens. People like you are adding to the problem.

Yes, giving the alien the right to become a permanent resident

No they have to become a citizen

Yes. A U.S. Citizen can legally marry an illegal alien. The alien must have valid up-to-date identification though.

I'm pretty sure that an illegal alien can marry a US citizen, or else those who obtained their green card via that route would not have been able to do so at all that way. I am aware also, that the US citizen must file for the alien's permanent residence.  If a marriage occurs and no filing of papers are done, the alien still remains illegal.  Of course, the US Immigration and Naturalization service is the best "person" to verify all this information.  Laws do changes constantly.

Whoever that tucson111 person is.. Is the most ignorant person ive ever heard of!!  If someone was brought to the united states  as a child..  Who can not help himself or know right from wrong, and who can not with any means decide "wow. This is illegal, im staying in my natural country".... That child should be punished? If you were to ask a typical american family if they work hard for their money .. They would say yes.. Even though they sit behind a desk all day! And iF you asked an illegal alien if they work hard for their money.. They would say yes..and Actually mean it! They come to this country for a better life. And you want to punish them! They have families over here.. They have jobs , they have everything we have! What if someone came to your house and took you away from everything you had .. And threw you back into a country that you dont even remember.. With no money .. And no sense of what to do!  STupid ignorant people!  So in all... MARRY AN ILLEGAL ALIEN!