Haiti, the Western hemisphere's poorest nation, has a long history of political violence and instability, with last yeat marked by riots over food shortages leading to the ousting of its government.
Al Jazeera’s Teresa Bo, reporting from Gonaives in Haiti, said 80 per cent of Haitians are living in poverty with three million affected by food shortages.
While some organisations such as the World Food Programme have feeding centres in the country, their funding runs out in June and they are concerned where future money will come from.
Haitians are also hoping international organisations will play a more important role in improving their living conditions as many people do not trust the government, she said.
At least 800 people were also killed and around $1bn damage was inflicted by four hurricanes that swept through the country.
Last month the Brussels-based International Crisis Group said donors at the conference should provide $3 billion over the next several years to help Haiti's economy, reduce its vulnerability to natural disasters and maintain access to basic services.
Clinton will meet Rene Preval, the Haitian president, on Thursday for talks on "stability, security and assistance", the US state department said on Tuesday.
She will then travel to the Dominican Republic, which shares the island of Hispaniola with Haiti, where she will meet Leonel Fernandez, the president, before flying to Trinidad and Tobago for the Summit of the Americas.