From Ballot Access News:
The West Virginia Secretary of State has released August 2013 registration data. All parties except the Democratic Party have increased their share of the registration since the November 2012 election, and the percentage of independents has also risen.
The August 2013 percentages are: Democratic 50.67%, Republican 28.79%, Libertarian .122%, Green (Mountain) .115%, unqualified parties and independents 20.30%.
The November 2012 percentages were: Democratic 51.85%, Republican 28.70%, Libertarian .118%, Green (Mountain) .107%, unqualified parties and independents 19.22%. Here is more detail, including an interactive chart to make it possible to see the data for any county. Thanks to Michael for the link.