Janet Claire Protasiewicz (/ˌproʊtəˈseɪwɪts/; proh-tə-SAY-wits; born December 3, 1962) is an American attorney and jurist from Wisconsin who has served as a justice of the Wisconsin Supreme Court since August 2023. Protasiewicz was elected to the court in the 2023 election, after previously serving as a Wisconsin circuit court judge in Milwaukee County from 2014 to 2023 and as an assistant district attorney in Milwaukee for 26 years.
