Tertry () is a commune in the Somme department in Hauts-de-France in northern France.
Tertry is situated east of Amiens, on the D44 and D45 crossroads.
Tertry was the site of the battle of Tertry in 687, where Pepin of Herstal defeated Berchar, mayor of the palace of Neustria.
In 1920, British soldiers built a bridge across the Omignon at Tertry.