John Lawrence Oncley (February 14, 1910 – July 14, 2004) was an American biochemist, and Professor Emeritus at University of Michigan.
He graduated from Southwestern College, and University of Wisconsin with a Ph.D. in 1932.
He taught at University of Michigan from 1962 to 1980.
Martha L. Ludwig was the J. Lawrence Oncley Distinguished University Professor of Biological Chemistry until she died in 2006.