ZIP Code 11780

In ZIP code 11780, which covers Stony Brook, households earn a median of $144,577, or $75,677 per person. Homes here carry a median value of $723,200, and the county-level property tax rate of 1.73% means owners pay a sizable amount each year on that assessment. Sales tax across the area totals 8.75%, adding to the cost of everyday purchases. Together, these figures sketch an expensive corner of Long Island: high earnings and high home values, paired with property and sales taxes that take a meaningful bite out of what households bring in.