If you are not picky about the breeds, and don't mind mutts, you will have a lot of choices through local farms. If you want a particular breed, you'll have to go to breeders or order shipped eggs.
Try looking on one of the Where Am I/Where Are You BYC threads to link up with some locals...or go to your local feed store....or look on Craigslist. Googling might also turn up a farm that is close enough to drive to.
Or go to the BYC Seller or Swap pages to find eggs either locally or that could be shipped.
https://www.backyardchickens.com/f/36/chicken-hatching-eggs
https://www.backyardchickens.com/f/16186/swaps
I've also used eBay. My Pet Chicken sells hatching eggs.
Shipped eggs typically have a 50% hatch rate as the eggs can get rattled from shipping handling...if they are rattled hard/broken, you could get 0% hatch.
Or...seriously....you could go to a Trader Joe's and see if they are carrying "fertile free range" eggs....there is a thread here on BYC about people hatching TJ eggs. Check the ship date and get one that is within a week (you'll have to read it by Julian calendar which assigns numbers according to 365 days of the year). While they have been refrigerated, supposedly there is about a 30% hatch rate.
Good luck.
Lady of McCamley