Justin Meredith Andrews (August 28, 1902 – June 29, 1967) was an American public health administrator and parasitologist, specialising in malaria.

Throughout his time at Johns Hopkins, Andrews's research focused on malaria and a range of other parasitic, tropical diseases.

Martin D. Young, writing in The Journal of Parasitology, called him "an internationally known parasitologist, a distinguished teacher, author, and public health administrator".

He was a Fellow of the American Association for the Advancement of Science among several other national organisations, and received several awards for his work: the Legion of Merit for his wartime work (1944), the Joseph Augustin Le Prince Award from the American Society of Tropical Medicine and Hygiene (1960), and the Public Health Service Meritorious Service Medal (1964).

Johns Hopkins awarded him an honorary doctorate in 1951 and Brown University, his alma mater, gave him its Bicentennial Medal in 1965.