Dumbledore (Dark horse )
Voldemort: Must die to end the series.
Hagrid (I think he is the inside favorite)
Draco Malfoy (Long shot. No sentimentally if he croaks.)
Snape (neck and neck with Hagrid)
Lucius Malfoy (three way with Hagrid and Bellatrix)
Delores Umbridge: She’s going down.
Mr. Weasley
Dudley ( longshot)
Bellatrix Lestrange- has a very good shot at dying off
In roughly declining order of odds of dying:
Snape – toast
Pettigrew – toast
Voldemort – Probably toast, except he might end up suffering one of those fates worst than death that Dumbledore keeps going on about (assuming you don’t already consider his present state to be worse than death)
Bellatrix – ditto
Molly, Arthur, Percy, Charlie, Hagrid, Neville, Luna – All possible deaths, although I don’t think more than one or two of them will actually die. They’re close enough to the main action for Harry and the readers to care, but all essentially expendable.
Harry – Unlikely but not impossible death. I don’t really think she’s going to go for a big self-sacrificing ending, in spite of the dire hints that he may be a Horcrux – but I may be wrong.
Lupin, Tonks, Fred, George, Bill, McGonagall – Unlikely deaths. Like the other group of second-tier characters, their deaths would have a fair bit of emotional impact, but the ongoing story arcs that have been set up for them don’t usually end that way.
Ron, Hermione – Very unlikely deaths. The romantic tension between them still has to be resolved, and it’s essentially a comic plot that demands a happy ending.
Ginny – No. She’s The Love Interest, and there isn’t any point in giving him a love interest in the first place if she isn’t there for Harry to come back to, or there to remember him if he dies.
I also think we’ll lose a few spear-carriers, like Amelia Bones and Emmeline Vance, but there’s no way of predicting who.
Oh, and I almost forgot – I’m willing to bet we’ll see at least one death of an unpleasant-but-not-actually-evil person (Petunia, Draco, Narcissa, Percy, etc.), probably in a way that will raise the audience’s opinion of the character by a considerable margin.
It’s hard for me to rank Draco or Narcissa as “not-actually-evil”, though I agree that Draco would be a candidate for a change of heart - after which he’s toast. As it is, though, he and his mom are definitely still in the Yellow Pages of Evil as far as I’m concerned.
I think I read that slashfic.
ducks 
I really want to see Snape kill Bellatrix. I just think that would be dashed amusing. “SHUT UP YOU MANKY COW. AVADA KEDAVRA.”
Perhaps I’ve been whooshed, but those two have already died (see first chapter of Half-Blood Prince).
I think the idea was that we’ll lose two more characters similar in importance to those two.
Gotcha, Jimmy Chitwood. I misunderstood.
In that category, I think Moody would be a possible death with significant emotional impact. Or Kinglsey Shacklebolt with lesser effect on the reader.
We’re all adults, but in the end Harry Potter are children’s books. Rowling has stated that sometimes bad things happen to good people, and that she won’t flinch from that. It sounds like, ‘Life isn’t fair. Better to learn the lesson early.’ But with millions of children invested in Harry’s story, it seems to me that that would be a very cruel lesson. If she kills Harry, there will be death threats.
If she kills Harry I think it will be giving this message: You didn’t ask for this. You’re a good person. You’ve fought the good fight. You’ve overcome adversity that would crush other people. (And remember that Rowling had a tough time of it before her books were published.) And after everything, you still die. You should have kept your head down, you schmuck.
I just don’t think that’s the message she really wants to send. At the end of seven books even a noble death would be pointless in a children’s book. So I see this dire hinting about Harry’s fate as a ploy to keep people guessing and to generate more sales. I can see her coming out at the end and saying, ‘You didn’t really think I’d kill him, did you?’
But I could be wrong.
Really? I thought she had said that Black wasn’t coming back, but AFAIK she hasn’t said in general that characters can’t comeback. Voldemort certainly did, in anycase. And of course their are myraid ways that dead characters can still stick around in the Potterverse, being ghosts, Horocruxs, the paintings of headmasters at Hogworts, etc.
It isn’t like any “really real world” I’ve ever seen 
Thank you! Now I don’t feel like I’m alone in my perversity, since that’s the first thing I thought, as well.
I can’t see Professor McGonnagal being killed off. She’s got to carry on as Head Mistress of Hogwarts.
Dumbledore and Black are dead, and I don’t see them coming back. That doesn’t mean Harry wouldn’t get taunted with that possibility, though.
I don’t think Percy will die, but I do think he may be gravely injured in some way as to redeem himself.
I agree with Drae that a truly sorrowful death that would stir the reader, the characters, but leave the unfolding of the plot unchanged as I see it would be for one of the Weasley twins to die. Just thinking about that gives me the shudders.
I can’t imagine Rowling Killing off Harry, Ron, or Hermione, but I’ve been shocked before by ruthless character disposal thanks to GRRM.
To be fair, she has made it clear that “coming back” is really not a good thing. Voldemort’s done it at the expense of his humanity. Being a ghost in the Potterverse is shown by Nearly Headless Nick in HBP to really not be good. Paintings are the only way of “coming back from the dead” that haven’t really been explored/explained, but they don’t seem to give a complete facsimile (and either way, you’re existing in 2D ;))
It’s not really comparable to the more revolving door system as used by many comics nowadays; something has to be sacrificed. To put it simply, not all of you is going to come back.
Nope. Snape is a…errr…quadruple(?) agent. He’ll be redeemed and replace Dumbledore as Head of Hogwarts. Count on it ;).
How about Harry and co. find a way to permanently turn him into a squib. He then has to spend the rest of his existance as a hideously deformed muggle named Tom Riddle Jr.
THANK YOU !!!
that was the first thing I thought of when JKR started to hint people were going to die. I said “bye Harry”, everyone else said an author would not kill off their main characters
So I give to them
(sorry I don’t know how to do the spoiler thing)
The red wedding
GRRM is a bit of an exceptional case, though. Still, I believe that if Rowling would kill off Harry if the story called for it.
No way will Harry die.
Remember JK planned the basic plot right from the beginning and Harry’s the hero. He’s suffered enough.
Voldemort is living on borrowed time. The only problem is how to get rid of his Horcruxes. But he isn’t one of the two that JK has announced she’ll bump off (I think it was four originally).
I’m sure a Weasley will die nobly and finally nominate Hagrid to pass away in Harry’s arms. (Well, more likely in five people’s arms, but you know what I mean 
)
voldemort will die.
Some member of Dumbledore’s Army will die in a battle that Harry is leading so Harry can have another huge guilt trip.
I think Ron and Hermione are safe but I’m sure one of the other Weasleys will die. That clock will have to come back in the story.
That curtain will come into play somehow as well. Probably advice from the other side, a la Obi Wan.
Who will Harry kill? I’m guessing he will kill Voldemort and someone else but I’m not sure who.
As soon as Pettigrew got his silver hand, I was sure that Lupin was for the chop, but given that Lupin’s now found love with Tonks, I’m going for a reversal of the legend. Or Pettigrew might kill Fenrir.
It seems that JKR wasn’t leaning in that direction. A lot of people think that it’s a reference to Judas’ 30 pieces of silver.