OCEAN CITY, N.J. — Known as “America’s Greatest Family Resort,” this beachside city now has a new distinction: It has become the epicenter of opposition to wind energy projects off New Jersey and the East Coast.

Residents of Ocean City and surrounding Cape May County, helped by an outside group opposed to renewable energy, are mobilizing to stop Ocean Wind 1, a proposal to build up to 98 wind turbines the size of skyscrapers off the New Jersey coast, which could power a half-million homes.