1.Sue Storm
2.Storm
3.Jean Grey
4.Mary Jane

I'm almost tempted to say that in Marvel's case there isn't one singular iconic female character like DC does. Sure, there are many candidates that come close like mentioned in this article and the comments but none come even close to matching WW's  popularity.  I honestly cannot account for why that would be the case though, for surely one would think that one of the hard hitting female characters of Marvel would be at Diana's iconic status by now.  Maybe the case is that Marvel never meant for just ONE character to be the iconic female lead and instead wanted to decentralize that popularity into many.  I mean if anyone comes close it should be Susan Storm I think considering that she turns 50 this year in comics since first being envisioned in 1961, but I think anyone will agree with me that her iconic status pales in comparison to Diana.  Still, even with that iconic status one would think that she would have had that movie or even new show by now, but apparently people are still having trouble trying to translate the Amazon from Themiscyra into live action role.  Perhaps someday it will happen. At least I hope it will.

Most iconic? I'd say Spider-Woman.

I vote for Storm.

Off My Mind: Why Marvel Needs a Wonder Woman

Glad I'm not the only one that thinks this!

I like Scarlet Witch but i think the winner is Ms Marvel!!!!!

No way is spider-woman the mane Marvel icon, its between Ms. Marvel and Storm I would say and I am leaning more towards Ms. Marvel because Storm dosnt stand out enough on her own she is characterized by the X-Men

It certainly isn't ms.marvel or spider-woman. no way guys!

its definitely NOT ms. marvel. do you guys know what iconic means? thats like memorable and representation.

Id say jean, or storm.

Most iconic is storm, no one else comes close. Whether they were first or not!

These are my top 10

1.Invisible Woman

2.Jean Grey

3.Storm

4.Mystique

5.Rogue

6.Ms Marvel

7.She-Hulk

8.Scarlet Witch

9.Black Widow

10.Emma Frost

has to be storm

My top 5 would be

1. Storm

2.Jean Grey

3.Rogue

4.Jubilee (for my own reasons)

5.Invisible Woman

(slip Ms Marvel there somewhere)

Marvel has no hierarchy like DC does.

Marvel hasn't consistently pushed any character for popularity. They kind of just go with whoever seems appealing at the time. So the answer to this question changes every few years.
Over the years though, Storm has gotten the most attention outside of comic books. She was in:
-all of the Marvel vs Capcom games
-both X-Men Legends games
-both Ultimate Alliance games

Ms. Marvel is the most iconic for me

and the toughest of the bunch too ;)

Eh...

Sue Storm is technically the first one, without a doubt.

Ms. Marvel though has always been in my mind their strongest female in personality though. With She-Hulk a close second.

Phoenix, Storm, Sue Storm, Elektra. 

Squirrel Girl..........j/k

I believe its Invisible Woman.

Sue Storm

you don't necessarily need one iconic female character for marvel. Just several well written ones. I thought the black widow series was excellent while it last (ps marvel please bring it back) and currently the x23 series is very entertaining. in general though all these characters need is a great writer to give them some terrific stories.

Sue Storm.

IT HAS TO BE STORM for overall media visibilty, Iconic status, resonance, uniqueness/recognisablity (word?) etc..  Invisible Woman a close second only because shes basically the fore runner.. tho truthfully up until recently she was ...well..kinda invisible -_- hidin/runnin behind Mr fantastic  whereas Storm kicked ass from the getgo of her inception in comics

Other than that lets be honest with ourselves NONE of the other marvel female characters ring ANY bells outside of Comics.. Marvel Girl?! Pshhh dont make me laugh 

it's STORM!!! 

Storm, Jean Grey, Sue Storm, and Rogue seem to be the main characters all my non-comic reading fans know, remember, and love the most.

As for myself personally? I'd have to say Jean Grey or Storm.

I think Marvel was pushing Ms. Marvel really hard a few years ago, but really stopped caring after canceling her ongoing.

I think for me the iconic females have been the ones in either the animated tv shows or movies. For me, the most stand-out heroines have been Sue Storm, Storm, Jean Grey and maybe Mystique.

Jean Gray's Phoenix

Honestly the X-men babes are the most iconic IMO. Jean Grey, Emma Frost and Storm.

 no one  marvel doesn't have iconic female Character like dc 

As it stands Marvel does not have an Iconic female character.  You can reach for one but really there is nothing that comes close the average woman doing something great and being referred to as a Wonder Woman.  It's a simple measure but its the measure I use. 

Squirrel Girl!... well at least a contender for the title right

For most recognizable, I'd say Storm (heck my brother has a Storm tennis racquet, the other options were Spidey and Wolvie), but Marvel really doesn't have a female character as iconic as Wonder Woman, simply because they don't bother trying to make any of them iconic.

To do that, they would have to let them stand on their own, not as part of a team, like nearly all of them are, and they would have to put them in the public's eye, which in this day in age means making a movie or TV series about them, because e lets face it, most people don't read comics.

Marvel has plenty of characters with star quality, but two that I could see actually making it are Ms. Marvel, and Spider-woman.  Marvel has done a lot for these characters in the past decade in the comic world, what with giving them both solo titles, with Ms. Marvel lasting some 50 issues, and giving them prominent roles in there team books as well.  Now all they need is more public exposure, and they could be well on their way to becoming an icon.

And who wouldn't want to see a Ms. Marvel or Spider-woman movie (as long as it isn't bastardized of course)?  I sure would be stoked about it!

Ok, by asking this question hundreds of times before, most people who dont read comics know who Storm is and She hulk.  Those are the two females that always come up if asked "name a marvel female". If i ask if they know spider-woman, even jean grey they are like "who?" Then asked Phinox they are like "oh ya her, she's ok." 99% of the time i get those answers.

STORM!!! How is this even a discussion? 

I dunno, I think it's pretty clear from the overwhelming sea of similar replies that there's a plethora of notable female marvel characters, and new ones making their way into public knowledge every day, like the ever growing popularity of Shadowcat or X-23, along with the amazing classics like Storm and the Invisible Woman.

Essentially, to the OP.
Whatch'u talkin bout Willis?

Also, Spider-Woman is only getting pushed because Bendis loves her.  That's the only reason.  There's nothing interesting about her.

I say  a six-way tie with Jean Grey,Storm, Invisble Woman,Wasp,Spider-Woman, & Ms. Marvel

Marvel doesn't have an iconic female character to the level of Wonder Woman. They probably never will.