WASHINGTON—Democrats, stung by criticism of their $787 billion economic-stimulus plan, are targeting Republicans who have attacked the program and then lobbied to get money for their districts.

More than a dozen Republican lawmakers supported stimulus-funding requests submitted to the Department of Labor, the Environmental Protection Agency and the Forest Service, in letters obtained by The Wall Street Journal through the Freedom of Information Act.

The stimulus package passed last February with no Republican votes in the House of Representatives. In the Senate, just three Republicans supported it: Olympia Snowe and Susan Collins of Maine and Arlen Specter of Pennsylvania, who later switched to the Democratic Party.

Lawmakers routinely send letters in support of federal funding for projects in their constituencies; some Republican lawmakers have deliberately avoided sending requests for stimulus dollars because of their opposition to the bill.

Rep. Paul Ryan, a Wisconsin Republican who called the stimulus a "wasteful spending spree" that "misses the mark on all counts," wrote to Labor Secretary Hilda Solis in October in support of a grant application from a group in his district which, he said, "intends to place 1,000 workers in green jobs." A spokeswoman for Mr. Ryan said the congressman felt it was his job to provide "the basic constituent service of lending his assistance for federal grant requests."