Back in 2012, the mission agency moved away from its long standing name of USPG (United Society for the Propagation of the Gospel) to move into a new era of its work.
However a number of supporters were unhappy at the face the word 'gospel' had been removed.
The new name will slightly change from the previous version with USPG standing for United Society Partners in the Gospel.
Chief Executive Janette O'Neill said: "We make this move cheerfully, more confident for the years spent as Us.
"The concept behind the name Us helped us look more deeply into mutual and interdependent partnership and the ways we are bound together by God's love.
"We move forward now with renewed emphasis on sharing the lived experience of our partners."
The change in name was announced ahead of the Greenbelt festival in which the charity will act as the event's lead agency and will encourage Christians to respond to the refugee crisis in Europe.