The campaign, during May, is the first time such a large number of bodies have come together to dedicate a month of campaigning to the issue.
Those involved are the National Missing Person's Helpline (NMPH), the Salvation Army, International Social Service, the Association of British Investigators, Reunite, the National Organisation for the Counselling of Adoptees and Parents as well as police forces nationwide.
Jessica Prasad, a PRO at NMPH, said that the aim was to consolidate all the organisations' separate efforts in order to maximise the impact.
NMPH has for the last two years organised a Missing Person's Awareness Day on 15 May to coincide with the UN's established Day of the Family.
'We didn't want to run the risk of other stories displacing the issue so it was decided to spend a month on this,' said Prasad.