Nils Carl Aspenberg (born 26 August 1958) is a Norwegian journalist, historian, author and businessperson. He has written numerous books on rail transport, and is chief executive officer of Baneforlaget.
Aspenberg has a siviløkonom degree from BI Norwegian Business School. He worked as a conductor for Oslo Sporveier since 1981, and later tram and train engineer, from 1983 to 2003, as well as a bus driver since 1994. He has written more than twenty books on rail transport and is owner of the publishing company Baneforlaget, which he founded in 1994. The company has published about 50 books. Aspenberg has been an active member of the Norwegian Railway Club, and was editor-in-chief of MJ-bladet from 1999 to 2003. He has also published the local history magazines Røakontakten from 1994 to 2008, and Langt Vest i Aker since 1994. He has also been an editorial member of Lokaltrafikk, Blickpunkt Straßenbahn and Store Norske Leksikon.