Welcome to iNat! Are there some features you're seeing in these photos that lead you to this ID?

Now that I look at this, I agree this is Prenolepis imparis too (one of the few ants I know). These are the small black ants that look kind of like the invasive argentine ant but their abdomens are bigger (and are native). They're often found walking around solitarily in the winter, and like argentine ants, they tend aphids.

Yes, they are super common and conspicuous in this part of the country, one of the few ant species that are active during the winter. Their mesosoma has a pretty distinctive profile: a bulbous pronotum followed by depressed mesonotum/propodeum, with a lateral promesonotal constriction. Their eyes are relatively large and set far back on their almost spherical head, and the gaster is big and fairly pointy posteriorly. If you were to look at their petiole under a microscope you would notice it has a distinctive wedge shape, too.

I just noticed that in some of the original pictures, you can see a tiny fringe of hairs at the tip of the gaster: the acidopore. This is a feature of the subfamily Formicinae, which automatically tells you that this isn't an Argentine ant, which belongs to the Dolichoderinae.