Lowell Jacob Reed (January 8, 1886 – April 29, 1966) was 7th president of the Johns Hopkins University in Baltimore, Maryland. He was born in Berlin, New Hampshire.
He had a long career as a research scientist in biostatistics and public health administration at Hopkins, where he was previously dean and director of the School of Public Health and later as vice president in charge of medical activities. As a researcher, he developed a well known statistical technique for estimating the ED-50, and his work with epidemiologist Wade Hampton Frost on the Reed-Frost epidemic models also remains well known. He died in Berlin, New Hampshire in 1966.