I like Prim and Johanna, from the Hunger Games.
Oh this is hard. I can't only pick one.
Hermione from HP or Meggie from Inkspell.
Katniss Everdeen would be my overall favourite fictional female character. She is strong, determined and brave in everything she does; someone I wish I could be. She's quite oblivious to romantic feelings and while this might be frustrating sometimes it shows a complete antithesis from the majority of teenage girls nowadays. This sounds so strange but I like that.
Hermione Granger too, of course, for being a symbol of great intellectualism among females.
Deryn (Dylan) Sharp, from Leviathan (Scott Westerfeld). Totally. No doubt about it.
She's great, strong. Smart, funny, determinate. She's everything I'd want to be.
(NB: I'm trying really hard to avoid spoilers right now, because I haven't read Goliath yet. I have to wait the paperback edition. This means: please, be good.)
I think Jane Eyre is an amazing female character. She was so strong and pure. I love that she had values and stuck to them. I also really like Fanny Price from Mansfield Park, mostly for the same reasons.
Luna Lovegood without question.. Or.. maybe Eponine? Hahaha. It is one of those two ladies. Luna is crazy and I love her airyness. Eponine reminds me of me.
Bellatrix Lestrange from Harry Potter. One must admire her crazy.
Grimalkin from The Wardstone Chronicles, Sam from The Perks Of Being A Wallflower, Sookie Stackhouse and Lily Potter. There are very few really admirable female characters :/