Republican Del. David Albo handily won his ninth term in the House two years ago after he and his Democratic opponent, Greg Werkheiser, engaged in the most expensive delegate’s race in state history.

This year another Democrat, Jack Dobbyn, will try to unseat Albo in what had been considered one of the most competitive House races in the state.

Dobbyn, vice president of operations at his family’s real estate consulting firm and chairman of the Fairfax County Young Democrats, announced he is running to “cast partisanship and special interests aside” and “use the same business-minded approach to deal with the problems’’ facing southern Fairfax County.

“I’m running for delegate because I want to make sure my daughters enjoy the same opportunities that I had growing up, and I want the same for you and your family,” Dobbyn said. “Southern Fairfax County deserves real leadership in Richmond, and I will be a tireless advocate for better schools, roads, transit, and our fair share of the tax dollars we send there.”

Albo said defeating him will be a “pretty big longshot” in a district that the Republican-controlled House made more Republican during this year’s redistricting process.

“I am not one of these delegates who doesn’t do any work,’’ he said. ”I’m not one of these guys who people don’t see.”