So the results for the June round of SATs came out recently, and many of my students have been asking me, "what is a good SAT score?" My answer is usually vague, because it's all relative--in my opinion, a good SAT score is a score that gets you into the college you want to attend.
That being said, it is nice to see where you stand in terms of percentiles, so I'd like to refer you to a couple of documents from the College Board that should help you out.
There are two main ways to evaluate your SAT scores: (1) composite, and (2) section-by-section.
The first document is especially interesting in that it shows the actual number of students who achieved that score, as well as a breakdown by gender.
In general, if you want to have a good shot at a top-ten school, then your score should be as close to 99% as possible, and if you want a good shot at a top-50 school, then your score should be at least 90% or above. You might also want to consider the ACT as an alternative, since the percentiles are somewhat more forgiving then they are on the SAT.