What is the highest staff note in music?

The highest staff note in music is typically C8, which is the highest C on a standard grand staff. It is located on the 5th ledger line above the treble staff. This note is often used in advanced compositions and vocal pieces, showcasing extreme ranges, particularly in instruments like the piano or for soprano voices. Beyond C8, notes can still be represented, but they usually require additional ledger lines or are notated differently.