Abstract: For many years, liberals have favored broad standing and conservatives narrow standing. Yet that pattern has disappeared and is now reversing. We studied the Supreme Court justices' votes on standing during the fifteen-year period from October Term 2010 through October Term 2024. Our results show a stark change in voting patterns around October Term 2020, when the Court obtained a conservative supermajority. We label this development "the standing realignment," discuss several interrelated explanations, and suggest implications.