Rep. Shelley Moore Capito raised $830,000 for her Senate bid in the final quarter of 2013, ending the year with $3.7 million cash on hand.
Secretary of State Natalie Tennant, the likely Democratic contender for the Senate seat, brought in close to $650,000 during the same time period, according to the campaign.
Capito, who started campaigning about one year before Tennant, holds a sizeable fundraising lead in the race to replace Sen. Jay Rockefeller, D-W.Va.
She's raised $4.94 million since starting her campaign in late 2012, compared to the nearly $800,000 raised by Tennant, who entered the race in September.
Capito announced in late 2012 she would leave the seat she's had in Congress since 2000 to run. Rockefeller announced in early 2013 he wouldn't seek re-election.
"The support I've received from West Virginians continues to be truly humbling. Each day, more and more West Virginians are joining my campaign for the United States Senate," Capito said in a statement emailed by campaign manager Chris Hansen.
Tennant announced her campaign about two weeks before the end of the third quarter. She raised about $150,000 during that 13-day period, according to her filing with the Federal Election Commission.
She raised $646,777 during the fourth quarter of 2013, according to the campaign.
"It's no surprise that long-time Washington Congresswoman Capito is raking in cash from her Wall Street friends, but the most important number is all 55 West Virginia counties that are supporting Natalie - because Natalie's campaign is about putting West Virginians first above special interest money, and it's West Virginia values, not Wall Street dollars that are going to win this race," Tennant campaign spokeswoman Jennifer Donahue said in an emailed statement.