He was born at Nes in Akershus, Norway. Krogh studied at the University of Oslo in 1958-63. He earned his Master's degree in English language and literature after studying at Wadham College, University of Oxford which he attended under a Norwegian Oxford scholarship from 1960-61. He attended the College of Europe at Bruges 1964-1965 (Robert Schuman promotion).
Krogh started working for the Norwegian Broadcasting Corporation (NRK) in 1965, where he covered, among other things, the European Community membership referendum in 1972. Krogh worked for TVNorge in the period 1994-96. Back in NRK he was one year in NRK Sport in 1997 before he was back in the news department. From 2003 he was the editor of Radio Kongsvinger.  In 2008 he received The King's Medal of Merit (Kongens fortjenstmedalje) in gold. 
Krogh died from amyotrophic lateral sclerosis. It has been speculated that he may have contracted the disease as a result of a tick bite. Krogh was diagnosed with Lyme disease in the fall of 2009. He was immediately hospitalized at the Borreliose Centrum in Augsburg, Germany, and remained there for four weeks. However, he was by then already so weak from his illness that the physicians were unable to administer the recommended dosages of antibiotics. He received some palliative herbal remedies before he was discharged into the care of his family.
- Dieter Mahncke, Léonce Bekemans, Robert Picht, The College of Europe. Fifty years of service to Europe, College of Europe, Bruges, 1999. ISBN 9080498319
- Matre, Jostein; Lars Kristian Solem; Trine Saugestad Hatlen; Marie Theisen (14 April 2010). "Lars-Jacob Krogh er død". Verdens Gang (in Norwegian). Retrieved 15 April 2010.
- "Kongens fortjenstmedalje". lokalhistoriewiki. Retrieved June 1, 2018.
- "Lars-Jacob Krogh død". Nettavisen (in Norwegian). 14 April 2010. Archived from the original on 23 April 2010. Retrieved 16 April 2010.
- "Flåttbitt kan ha tatt livet av Lars-Jacob Krogh". Verdens Gang (in Norwegian). 7 May 2010. Retrieved 7 May 2010.
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