Hi all! I’m currently a Junior in High School and I’m from the United States. I’ve been quite interested in applying to the University of Oxford to study History for awhile now, and I was wondering if you guys could give me some advice. I’ve looked at their website and seen the so called “minimum requirements” for American Students (it was 2100 SAT, 3 5’s on AP tests/3 Subject tests of 750 or higher) but obviously those requirements don’t really tell me much. Currently, I am planning on taking: the AP Biology, AP US History, and AP Spanish exams, as well as the French and World History subject tests. Should I look into taking any other AP tests or subject tests? I am extremely passionate about history, and am very willing to take more if need be to demonstrate this to Oxford by the time application season comes around. Thanks for reading, and I appreciate any advice 
I can’t offer specific advice.
Look on the Oxford web site as well as the Student Room (on UK unis), if you haven’t already. You will have to mine deeply into past dialogues, even in the Cambridge ones, as admissions tutors discuss openly what their criteria are.
My d is at Cam, if you scroll down my posts you will find my description of her admissions experience (she is American, but applied from France, so her situation is not identical to yours).
From a UK p.o.v., taking only 1 AP in history doesn’t say ‘passion’ very clearly (though the WH subject test helps). You certainly need a minimum of one more relevant test- your bio is completely uninteresting to the history tutors, and unless your passion is for Spanish or French history, so is the Spanish/French- but then, why would you not have taken AP Euro?
Be aware that if you are looking at 2016 entry your application will be due Oct. 15, 2015, and that you will need to register for the History Aptitude Test (HAT) by then, and take it in early November. It can be a hassle to organize if your school hasn’t done it before & there is no British / international school nearby.
Also, fyi, most successful UK applicants get offers ‘conditional’ on the exams that they sit at the end of senior year, so they don’t know for certain that they have their place till the results come out in August. Be prepared for the possibility that any offer you get will be conditional on your senior year scores. There are always some Americans who have enough APs to get unconditional offers (or in the case of one mathmo, off the charts aptitude test / interview performance), but it is not common. You will only be given conditions for tests that you are already planning to take- you list them on your UCAS app. Also, some APs count more than others- comp gov & us gov are only 1/2 APs. The list of APs is here: https://www.ucas.com/ucas/undergraduate/getting-started/entry-requirements/tariff/tariff-tables/966. Oxford doesn’t really pay attention to tariff points, but they can notice the difference between A & BAPs).
Alcibiade’s recommendation on the student room is excellent- look for threads on Americans applying to Oxford, and (around May/June) the official 2016 Oxford applicants thread (in the UK you are classed by your year of entry not finish, as courses have different lengths).
My D is at Oxford in a joint history course. She applied with 5s in WH, US Gov, Lit, and Lang (& Environmental Science, but they weren’t interested in that), and her offer was 5s on AP Euro and USH, plus a 5 in either Comp Gov or Latin.It wasn’t much fun being the only senior for whom they AP score actually mattered, but it was worth it in the end.
History, languages, Eng Lit are all excellent choices. Biology is largely irrelevant.
Thanks a lot. The reason I don’t have any more History APs is because they only offer US History at my school 
but I’ve recently decided that I will be sitting the AP European History test as well.
That’s a good idea - apart from anything else your interest in studying for it will help to show you’re genuinely interested in history. Good luck!