Diversity among the social network's tech workers was far less even, with 84 percent men and 16 percent women. Among non-tech workers, 48 percent are men and 52 percent women.

Facebook's senior leadership is still overwhelmingly white and male. Women comprise only 23 percent of the senior leadership while men comprise 77 percent, unchanged from last year.

More Asian people made up senior leadership with 21 percent this year, compared to 19 percent last year, but the number of senior-level Hispanics decreased from 4-3 percent.

In a blog post, Facebook listed several initiatives to increase its diversity. They included a Facebook University training program, which invites college freshmen from under-represented groups to spend a summer working alongside Facebook mentors, and a training course geared toward conversations about stereotypes and bias.