Britain will give at least £33 million in aid to Darfur as part of a £67 million package of support for Sudan, the Department for International Development has announced.
The money will ensure 1.7 million people a year in Darfur have access to safe water and sanitation and 1.5 million people are given emergency food supplies, the Government said.
International Development Minister Lynne Featherstone said: "Our aid will help the poorest to get the help they need to stand on their own and make them better able to cope when crises occur."
An international donors conference is being held in Doha today for the development of Sudan's western region, which has been riven by violent conflict for a decade.
Almost half of Darfur's population depend on emergency relief and nearly two million remain displaced since the conflict began in 2003.