Harbor Plaza was developed in 1987 as the premier shopping center in the Midcoast. Today, the center is home to several strong national tenants, including Rent-A-Center, Olympia Sports, H&R Block, Label Shopper, and the UPS Store, and is anchored by Shaws, Staples, and TJ Maxx/HomeGoods.

Harbor Plaza is the go-to shopping mall for both local residents and the massive influx of tourists Midcoast Maine sees in the summertime. High foot traffic between stores provides excellent in-line store business.