A simple search = 400 million hits - give or take a few million that probably have no application re calls to artists. It's a gold mine!
The hardest thing you have to do is the research i.e., narrow it down to location/time frame/specific criteria and requirements/cost/best fit for your work.
P.S. - If a particular competition names the juror(s), = more research!
P.P.S. - Create a spread sheet listing all those competitions that interest you with soonest date of submission first. You can easily keep track of deadlines and ones you've applied to, works submitted, etc. If you get rejected to one you can move on to another one and you won't have to go internet searching each time.