The most recent poll released by Roanoke College showed Clinton with a 16 percentage point lead in the state, 48 percent to 32 percent, in a four-way race that includes Libertarian candidate Gary Johnson, who is polling at 9 percent, and Green candidate Jill Stein clocking in at 3 percent.
In a two-way race solely between Clinton and Trump, her lead widens to 19 points, 55 percent to 36 percent.
The last Roanoke poll was conducted in May, before either candidate had officially secured their respective party's nominations, and showed the two candidates tied.
Pollster Harry Wilson, the director of Roanoke College's Institute for Policy and Opinion Research, said there is little good news in the numbers for Trump, whose poor showing in the state has shown up in every recent poll.
"There is no silver lining in this dark cloud for Donald Trump. His numbers are mostly negative and stagnant," Wilson said. "He's still getting less than 80 percent of Republicans, and his supporters are more likely to be voting against Clinton than for him. The election is 11 weeks away, but he has a lot of ground to make up."
A Quinnipiac University poll conducted at roughly the same time showed Clinton with a 12-point lead, 50 percent to 38 percent.
A Washington Post poll showed Clinton leading by 8 points, 51 percent to 43 percent.
The Real Clear Politics average of the last five polls completed in the state shows Clinton leading by 12.8 percentage points.
The super PAC supporting Clinton's campaign, Priorities Action USA, announced it was suspending its advertising in Virginia, saying the lead was comfortable enough to divert resources to more closely contested swing states such as Ohio and Florida, where polls show her leading by much smaller margins.