Hillary Clinton's presidential campaign said Friday it raised $37 million in the past three months and more than $112 million in all of 2015 to support her bid for the Democratic nomination.

US Democratic presidential candidate Hillary Clinton listens as she is introduced at a campaign town hall meeting in Concord, New Hampshire January 3, 2016. [Photo/Agencies]

Clinton's team also said she raised $18 million for the Democratic National Committee and state Democratic parties nationwide in the fourth quarter, putting her total haul for the past three months at $55 million. The fundraising for the DNC and state parties is aimed at helping Clinton in the general election should she win her party's nomination.

Clinton's fourth-quarter amount exceeded the $28 million she raised in the three months that ended Sept. 30. Heading into the January sprint toward the leadoff Iowa caucuses on Feb. 1, Clinton's campaign said it has nearly $38 million in cash on hand.

"Thanks to the hundreds of thousands of Americans who have joined together and powered this historic campaign, we are now heading into Iowa and New Hampshire with the resources we need to be successful," campaign manager Robby Mook said in a statement. Clinton's campaign had set a goal of $100 million for the primary in 2015.

Clinton's chief rival Bernie Sanders reported raising more than $33 million in the same period as Clinton. The Vermont senator has collected more than 2 million individual contributions and raised money online at a vigorous pace, taking in about $40 million through the end of September and ending that period with about $27 million in the bank.

His campaign has noted that most of its donors have given in small increments — about $20 to $30 apiece — allowing Sanders to return to them repeatedly.

While Clinton has built a steady lead in national polls, Sanders remains competitive against her in Iowa and holds a slight advantage in New Hampshire, his New England neighbor which holds its primary on Feb. 9. The third major Democrat in the race, former Maryland Gov. Martin O'Malley, has lagged behind Clinton and Sanders in fundraising and polls.

The Clinton campaign said more than 60 percent of its donors in 2015 were women. It also said 94 percent of the donations it received in the fourth quarter came in increments of $100 or less, but it did not say what percentage of its overall fundraising total came from such small-dollar donors. The campaign spent about $75 million in 2015, building large organizations in the early voting states and a data-driven operation to connect with voters.

Helped by several fundraisers headlined by former President Bill Clinton, most of Hillary Clinton's money came via traditional fundraising events, where the price of entry was often the legal maximum donation of $2,700 for the primary. The presidential candidates have until Jan. 31 to report such details to federal regulators.

Clinton isn't alone in releasing some selective details ahead of that schedule. Earlier last week, Republican Texas Sen. Ted Cruz's campaign said it had raised nearly $20 million in the fourth quarter.

Cruz's campaign said in a memo to supporters that he will finish the year having raised more than $45 million, but it did not disclose how much the campaign has spent or how much cash it has on hand.