The demographics of the Supreme Court of the United States encompass the gender, ethnicity, and religious, geographic, and economic backgrounds of the 116 people who have been appointed and confirmed as justices to the Supreme Court. Some of these characteristics have been raised as an issue since the court was established in 1789. For its first 180 years, justices were almost always white male Protestants of Anglo or Northwestern European descent.
Prior to the 20th century, a few Catholics were appointed, but concerns about diversity on the court were mainly in terms of geographic diversity, to represent all geographic regions of the country, as opposed to ethnic, religious, or gender diversity.