Maybe some species of solidago (goldenrod).
hortster

I think it's Horseweed, Conyza canadensis.

Here is a link that might be useful: horseweed

It looks just like the horseweed Conyza canadensis.
But there are other variations of the same weed
so it took me a bit of looking to realize it was
the same weed.

Thanks for the help everyone!

I've got lots of those in my backyard too! I keep yanking them out, but as soon as I yank one out, I find more.