The Gibraltarians voted on who should rule the Rock.
The result was a 98.97% No to shared sovereignty (or rule) between the UK and Spain.
Spain's foreign minister has said the result has no value, because it is a "largely virtual" vote based on just an idea.
London also says the vote has no legal weight.
But the people who live on Gibraltar think it will send a powerful signal to London and Madrid that joint rule is not what they want.