Campaign donors from Washington, D.C., have given more money to super PACs in this election cycle than donors from any other city in the United States, according to an analysis released today by MapLight, a nonpartisan group that follows political money.

Inside-the-Beltway donors gave $71.6 million, or 14 percent, of the more than $510 million that super PACs collected through Sept. 30 of this election cycle, MapLight found.

The MapLight ranking belies Washington’s traditional reputation as a relatively marginal center for campaign fundraising. Both GOP presidential nominee Mitt Romney and President Barack Obama have spent more time courting donors in places such as New York City, Dallas and Los Angeles than they have in the nation’s capital.

Unrestricted super PACs, however, appear to be raising large sums from D.C. donors, underscoring how the Supreme Court’s 2010 Citizens United v. Federal Election Commission ruling has changed traditional fundraising patterns.

The second-ranking city in terms of super PAC donations was Las Vegas; donors there gave $48.7 million to super PACs, or 9.5 percent of the total. Next came New York City, with donors giving $40.8 million, or just less than 8 percent of the total.

The remaining top-donating cities, in descending order, were Houston, Dallas, Chicago, Los Angeles, Little Jackson Hole, Wyo., Detroit and San Francisco. All told, 57 percent of all super PAC donations came from the top 10 cities, MapLight found.