An estimated 220,000 people died, over 300,000 were injured and over 1.5 million people lost their homes in the 7.0 magnitude earthquake that struck Haiti on 12 January 2010.
Christian Aid has distributed 237,000 hot meals and 10,000 hygiene kits, provided emergency shelter to nearly 2,500 families and donated cash to over 5,600 households but more needs to be done.
Christian Aid Country manager Prospery Raymond, who was in Port-au-Prince at the time of the earthquake, said: "Although much has been achieved, the international community must not become complacent about the pace of progress or the outstanding needs.
"The fact is, many Haitians continue to live in a desperate situation. The majority are trapped in poverty, with little access to basic services.
"More than 85,000 are still displaced, living in temporary camps. The country needs investment to build around 30,000 new houses a year for the next decade."
The charity says many institutional donors and NGOs have reduced their funding for Haiti's development at the time when it's needed most.
Mr Raymond added: "Haitians have made remarkable strides since January 2010. While I am optimistic about our future, this fifth anniversary comes at a time of political unrest.
"Recent weeks have seen public demonstrations over the failure of the administration to hold long-anticipated elections. The situation is tense.
"I hope our leaders will resolve the political crisis and find the best solution for the Haitian people. Otherwise, this situation could undo all the good work that has been achieved over the last five years."
Director of the Haiti Hospital Appeal, Carwyn Hill, speaking on Premier's News Hour to Antony Bushfield:
Justin Dowds, from Christian charity Compassion UK, speaking to Premier's Aaron James: