Marconi scandal, a British political scandal.

Marconi class submarine, an Italian class of submarine.

Enrico Marconi, also known as Henryk Marconi, an architect

Leandro Marconi, an architect, son of Enrico Marconi

Guglielmo Marconi (1874–1937), an Italian-born radio pioneer.

Marconi Stallions, a Sydney football club,

Marconi Company, founded by Guglielmo Marconi; absorbed in 1956 into English Electric, which in turn was purchased by GEC in 1968 and used as the focus of its defence businesses.

Marconi Electronic Systems or GEC-Marconi, defence arm of GEC, sold to British Aerospace in 1999 to form BAE Systems

Marconi plc, name adopted by GEC in 1999, now a part of Ericsson.

Alenia Marconi Systems, a former British-Italian defence electronics company, now split between the BAE Systems and Finmeccanica.

Matra Marconi Space, a former Franco-British aerospace company, now part of Astrium.