"Today we call upon the government of Nigeria to establish a national victim fund for all the victims who are suffering at the hands of Boko Haram," delegation co-chair Sheila Jackson Lee told reporters in the capital Abuja.
The delegation was in Nigeria as part of global efforts to drum up support for the rescue of the teenage girls kidnapped on April 14 from their school in the northeastern town of Chibok.
Lee said the special fund should provide help "for the girls who are still missing, for the girls who escaped, for their families, for the father who came and spoke to us about his missing daughter," adding that "they need compensation."
"It is time for economic empowerment and jobs, to ... Give the young people of the north and all around Nigeria the opportunity for jobs and education," she said.
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Delegation leader Steve Stockman said the US Congress realised that "the best thing that could happen is if we have a fund set up for those that lost their lives and for the families that remain here on this earth."
"Everyone around us has a responsibility to find these young girls. And we cannot afford to give up until we find all (the) young women who were kidnapped from a school which is supposed to be a safe place," she said.
Two of the girls who escaped from their captors attended the news conference but were not allowed to speak.
The United States, Britain, France and Israel are helping Nigeria in the search for the girls still held by the extremists, who have been active for some five years.
With 80 US military personnel specialising in intelligence, surveillance and reconnaissance deployed in neighbouring Chad, the United States is the biggest foreign participant in the effort against Boko Haram.
Washington has also sent surveillance drones, spy planes and about 30 civilian and military specialists to support Nigeria's security forces.