The word "Tango" in the corporate name originates from the name of the area the line operated in, the Tango Province, which was formerly a Japanese administrative district based on the legal codes called ritsuryo in the Nara and Heian periods; it is also a word play on the dance music, tango.
社名のタンゴとは、路線の所在する地域の令制国である丹後国に由来し、音楽のタンゴにも掛けたものである。