July marks the third straight month that Mitt Romney and the Republican National Committee have out-raised President Obama and his Democratic counterparts.
A joint fundraising committee including the Republican National Committee, the Romney campaign and several state parties raised about $101.3 million in July, the campaign reported on Monday.
By contrast, Obama and the Democratic National Committee raised about $75 million in July, according to the campaign, which released the figures via Twitter.
The Republican effort, which raised just more than $106 million in June, has about $185.9 million on hand as of the end of July. The Obama campaign did not release cash-on-hand figures.
Roughly 94 percent of the Republican donations were $250 or less, according to the Romney campaign, for a total of about $25.7 million. Roughly 98 percent of Obama's cash came from those donating $250 or less.
Matt Vasilogambros contributed contributed to this article.