- A Summer Place Realty
- All Island Realty
- Bastian Real Estate
- Bay's Edge Realty Inc
- Bob Howard Real Estate Inc
- Century 21
- Cherry Grove Island Realty
- Cuff Commercial Real Estate
- D Katen Fire Island Properties
- Greenwood Realty & Dev Corp
- Island Properties-Pines Inc
- Leesa Byrnes Realty
- Li Real Estate Corp
- Mortgage Outlet
- Paines Harbor Realty
- Pines Commercial Properties
- Prudential Douglas Elliman
- Seaville Realty
- Shirley Munnell Real Estate
- Sue Byrnes Realty South Main
