School feeding in?

Is Princeton high school considered a school that feeds into Stanford?

No

Considering that 0 student from the past four graduating classes is attending Stanford. Probably not. However, 70 students from PHS are attending Princeton University so that is pretty good. It’s a solid feeder to Rutger, Princeton, and NYU. However, do note that quite a number children of Princeton staff attend Princeton High. This does give them a good boost.