The Observer has been serving Sarnia-Lambton since 1853 and publishes six times per week, Monday through Saturday. This broadsheet is a member of the Sun Media family of newspapers. Daryl C. Smith is The Observer 's publisher. Rod Hilts is the managing editor.
The offices of the Observer are in Sarnia. The paper is printed in London, Ontario, on presses owned by Sun Media, which also publishes the London Free Press.