The Harbor Church resides in the Old Harbor Historic District. The historic Baptist church on Block Island is affiliated with American Baptist Churches but welcomes visitors from all over to their services. Year-round Sunday morning worship happens at 10 am, followed by coffee hour. Harbor Church is open from 9 am - 5 pm Monday-Sunday.

The Harbor Baptist Church is located on the main street of town called Water Street. The address is 21 Water Street Block Island, RI 02807.