Harris, who is of Indian and Jamaican descent, became the second major candidate to announce her first-quarter fundraising total after South Bend, Indiana, Mayor Pete Buttigieg said he raised over $7 million in the first quarter, the report said.
Harris said she received 218,000 individual contributions during the first quarter and 98 per cent of those contributions came in amounts smaller than $100.
"A nationwide network of hundreds of thousands of grassroots supporters has stepped up to lay the foundation for a winning campaign," Harris' campaign manager Juan Rodriguez was quoted as saying by the Hill magazine.
"This is a campaign powered by the people, focused on making healthcare a right, putting $500 a month in the pockets of working Americans, and giving every public school teacher in America a raise. We're excited by the support we're already seeing."
Harris' campaign stressed that she is seeking donations only for the primary election and that 99.45 per cent of her donors can contribute again because they did not hit the maximum for the primary and general election.
The campaign's announcement came after Sunday's Federal Election Commission quarterly fundraising deadline.
If elected, Harris would create history by becoming the first woman in the White House.
Harris did not disclose how much she has spent during the first three months of the year, nor how much cash she has remained in the bank for the long primary fight, the report said.
Her number is certain to be eclipsed by Senator Bernie Sanders of Vermont and former Representative Beto O'Rourke of Texas, who each raised about $6 million in the first 24 hours of their campaigns, but it establishes a benchmark for the other Democrats who are competing for donors in an exceedingly crowded environment.
Indian-Americans constitute 1 per cent of the American population and are one of the fastest growing minorities in the country.
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