Ernő Koch (8 August 1898, in Szászváros, Austria-Hungary (now Orăștie, Romania) – 31 March 1970, in St. Louis, United States) was a Hungarian graphic artist.
Also, during this time Koch worked as an Industrial Artist providing illustrations of machines, aerial views and products.
In September 1938 the "Hungarian Art Exhibition in Tallinn" opened, and was attended by Estonian President Konstantin Päts as well as various diplomats and ministers.
In 1952 he married Estonian[citation needed] J. K. in New York and moved to Chicago where he worked for Karl Hackert Inc., a firm that designed stained glass windows, altars and mosaics for churches.
He was commissioned by a Boston architectural firm to design a mosaic ceiling depicting twenty Polish saints for the Basilica of the National Shrine of the Immaculate Conception in Washington, D.C.
Works by Koch can be found in churches, museums and private collections throughout the United States, Canada and Europe.
Some examples of his stained glass windows can be found at the Basilica of the National Shrine of the Immaculate Conception, Washington D.C.; Basilica y Parroquia La Purisima Concepcion, Monterrey, Mexico; Chapel of the Alexian Brothers Hospital, St. Louis; Chancery Office of the Archdiocese of St. Louis; and St. Augustine Episcopal Church, Wilmette, Illinois.
I knew and worked for Ernő in his Brentwood studio from 1966–1969, when I was a student at Concordia Seminary, Saint Louis, Missouri.
Following Koch's death, his unfinished commissions were completed by Jim Nickel, a sculptor currently living and working in New York City who is exhibited by the Atrium Gallery, Saint Louis.