55 and Older Communities in Nassau County Knickerbocker Bay Club – Port Washington 62 and Older Seasons at East Meadow – 55 and Over Meadowbrook Pointe Harbor View at Port Washington 55 and Over The Seasons At Plainview 55+ Condo Nassau County The Tiffany – 55 and Over Adult Community The Seasons at Seaford – 62+ Condos Nassau County