The Washington University School of Law (WashU Law) is the law school of Washington University in St. Louis, a private research university in St. Louis, Missouri. Founded in 1867, it is the oldest continuously operating law school west of the Mississippi River.

In 2025, WashU Law reported a median LSAT score of 175 for its incoming Class of 2028, which is the highest median of any law school in the United States. The school offers JD, LLM, MLS, and JSD degrees, along with a range of dual-degree programs in conjunction with other schools at the university, and graduates around 230 to 250 JD students each year.