Hillary Clinton's campaign raised more than $27 million for her primary campaign in May and more than $13.5 million for the Democratic National Committee and state parties.
Clinton's campaign says it enters June with more than $42 million in the bank as it nears the end of the primaries against Democratic rival Bernie Sanders.
Clinton has raised more than $240 million during the primaries and more than $62 million for the DNC and state parties through a joint fundraising committee for her presidential campaign.
The former secretary of state is close to clinching the Democratic nomination and a general election matchup against Republican Donald Trump. Clinton and Sanders are competing in California, New Jersey and four other contests on Tuesday.
Sanders did not immediately report early fundraising details for May.