Halcyon Ave, Southold
- 31 Halcyon Ave Walsh Park Benevolent Corp
- 172 Halcyon Ave Carroll, Brian J
- 174 Halcyon Ave Carroll, Deborah A
- 498 Halcyon Ave Kinlin, Bruce D
- 499 Halcyon Ave Congdon, David J
- 573 Halcyon Ave Smith, Alistair
- 809 Halcyon Ave Highland House Fi Llc
- 811 Halcyon Ave Highland House Fi Llc
- 1012 Halcyon Ave Hay Harbor Club Inc