Barbara A. Lenk (born December 2, 1950) is an American attorney and jurist who served as an associate justice of the Massachusetts Supreme Judicial Court.

[6] In May 2014, the Supreme Judicial Court unanimously rejected a legal challenge to a Massachusetts law requiring the recitation of the Pledge of Allegiance in schools.

"[7][8][9][10] In a separate concurring opinion, Lenk explained that she agreed with the outcome of the court's decision because the plaintiffs challenging the state law "did not successfully allege that their children receive negative treatment" as a result of their decision not to recite the words "under God," or that their children had been reduced to "second-class citizen[]" status because of their beliefs.

[10] However, Lenk also wrote that "should future plaintiffs demonstrate that the distinction created by the pledge as currently written has engendered bullying or differential treatment, I would leave open the possibility that the equal rights amendment [of the Massachusetts state constitution] might provide a remedy.”[8][10] In 2017, Justice Lenk found that the federal Stored Communications Act did not prevent the personal representatives of a deceased person from accessing his emails.

[5] She is a Trustee of Western New England University,[15] where she chairs the academic affairs committee,[4] and a member of the Boston Inn of Court.