Rosemary Mayers Collyer (born November 19, 1945) is an inactive Senior United States district judge of the United States District Court for the District of Columbia,^[1] and a former judge of the United States Foreign Intelligence Surveillance Court.^[2]

Born in Port Chester, New York,^[3] Collyer received a Bachelor of Arts degree from Trinity College (now Trinity Washington University) in 1968 and a Juris Doctor from the University of Denver College of Law in 1977.

She was in private practice at the law firm of Sherman & Howard in Colorado from 1977 to 1981. She was then Chairman of the Federal Mine Safety and Health Review Commission from 1981 to 1984 and General Counsel of the National Labor Relations Board from 1984 to 1989. She returned to private practice in Washington, D.C. as a partner in the firm of Crowell & Moring LLP from 1989 to 2002. She was the first woman to serve as the chair of the Federal Mine Safety and Health Commission, as the general counsel of the National Labor Relations Board, and as the elected chair of a major D.C.-based firm.^[4][5]

On August 1, 2002, Collyer was nominated by President George W. Bush to a seat on the United States District Court for the District of Columbia vacated by Thomas Penfield Jackson.^[6] Collyer was confirmed by the United States Senate on November 14, 2002, and received her commission on November 15, 2002. She assumed senior status on May 18, 2016.

In 2013, Collyer was appointed by the Chief Justice of the United States to a seven-year term on the Foreign Intelligence Surveillance Court.^[2] The Court provides a measure of judicial oversight over surveillance activities under the Foreign Intelligence Surveillance Act, as amended. Judge Collyer's term on the FIS Court began on March 8, 2013, and was set to conclude on March 7, 2020. She replaced Judge John D. Bates, whose term ended on February 21, 2013.

On December 20, 2019, she announced she would step down early as the Presiding Judge FISC due to health reasons.^[7] She was succeeded by FISC Judge James E. Boasberg elevated to preside.^{[citation needed]}