NGK may refer to:
Companies NGK Corporation, formerly NGK Insulators, is a Japanese ceramics company Niterra, formerly NGK Spark Plug, a japanese company that manufactures spark plugs and ceramics NGK, Inc. parent company of the Universal Wrestling Federation (Herb Abrams)
Other NGK, Nederduitse Gereformeerde Kerk, the Dutch Reformed Church in South Africa, a Reformed Christian denomination in South Africa. Dutch Reformed Churches (Nederlandse Gereformeerde Kerken), denomination in the Netherlands NGK (film), (Nandha Gopalan Kumaran), a 2019 Indian Tamil-language political action film written and directed by Selvaraghavan.