Short answer: Yes. Long answer: this is a really stupid question. Read them and figure it out. I mean, of course they are! But this question often seems to mean something more specific, i.e., do your comics have a specifically feminist agenda? To which the answer is no. I am a declared feminist, not afraid of the label, but I simply allow my view of the world to inform my writing, not dictate it. My comics are implicitly feminist (because I am), but not explicitly so (because that’s not what I’m interested in writing about). Why aren’t men asked this question?!
Corollary question: is the comics world sexist? I can only speak for the “alternative” comics end of things, but my experience has been: implicitly perhaps, but not explicitly so. No one has ever told me that they aren’t interested in publishing/carrying/selling/buying my work because I’m female, but then again, there are quite a few female comics artists I know or know of, and I don’t see their work represented as well as they ought to be, but then again, I have no idea. Maybe there just aren’t enough of us. We do get asked stupid questions like this one, though. As to the “mainstream” comics world, yes, to my knowledge it is sexist, though it seems to be so mostly on the readership side, not the editorial side, but I don’t have that much to do with it, so don’t quote me on that.