Good news but it really needs to be more evenly spread out across the country in order to really make serious change for workers.
Union membership nationwide rose by 219,000 in 2015 compared to the previous year, a Bureau of Labor Statistics survey reported. BLS calculated that unions had 14.795 million members last year and that their share of the U.S. workforce remained unchanged at 11.1 percent.

The survey showed unionists still concentrate in the Northeast, the Great Lakes and the Pacific Coast, and are fewest in the anti-union South. The most union-heavy states by percentage are New York and Hawaii. And it showed female union workers are close to pay parity with union men.

Membership increases occurred even as unions battle right-wing politicians and their business backers over the right to organize, union dues and other issues. The right wing triumphs were most obvious in a sharp decline in one state, Wisconsin.

Public workers are still five times more likely to be unionized (35.2 percent) than private-sector workers (6.7 percent), with teachers and public safety workers leading the way. Public and private densities changed little from 2014. The public sector added 23,000 unionists, to 7.241 million last year, slightly fewer than the 7.554 million private-sector unionists.
https://teamster.org/blog/2016/02/un...ationally-2015