Here is the link to APSA’s list of upcoming conferences. Notice that the page includes the dates of the conferences, the deadlines for submitting papers (“calls”), and also calls for journal submissions. There are many more conferences than just APSA, Midwest and ISA out there. Check out the list, you might find something that is right up your alley.
(However, there are many more conferences every year that don’t get listed by APSA. If you don’t see it there doesn’t mean it’s not happening. We’ll do our best to list other conferences we become aware of in the comments below)