Long Island
Riverside, New York
Riverside is a hamlet — a community without a village government of its own — in Suffolk County, part of New York's Long Island region, with about 2,900 residents at the 2020 census.
Whether you're moving in or you've been here for years, the checks that matter most are the school district, the assessment and STAR, and — outside the cities — the well, the septic, and the flood map.
- Type
- Hamlet (CDP)
- County
- Suffolk
- Region
- Long Island
- Population (2020)
- 2,882
Local Almanac
Notes in and around Riverside
Short, sourced notes tied to this place, its county, or nearby communities.
Nearby · History & Culture
Riverhead Follows the Peconic
Riverhead's Peconic River mills and historical society building keep downtown history close to the water.
Read this note ->Nearby · History & Culture
Riverhead's County-Seat Role Gives Main Street Civic Gravity
Riverhead is a Peconic River town with county-seat work that gives Main Street daily civic weight.
Read this note ->Nearby · The Outdoors
Hallock State Park Preserve gives Riverhead a Sound-side pause
Hallock State Park Preserve adds a Riverhead shoreline pause through North Fork fields, bluffs, and a state-protected landscape.
Read this note ->Nearby · Cars & Driving
Suffolk Outer Beach Driving Is a Permit-and-Equipment Trip
Suffolk's outer beach access depends on a 4x4 permit, required vehicle documents, required safety equipment, and changing beach conditions.
Read this note ->Nearby · History & Culture
Riverhead aquarium visits should start with the official site
Riverhead visitors should check the Long Island Aquarium site before assuming hours, tickets, exhibits, or event access.
Read this note ->Nearby · Home & Property
Riverhead building permits need notarized application paperwork
Riverhead’s building page says original notarized applications must reach the Building Department before a permit is issued.
Read this note ->Suffolk County · Home & Property
Suffolk Owners Can Use the Clerk's Watch List
Suffolk's Homeowner Watch List can email owners when land-record filings show up for a registered property.
Read this note ->Suffolk County · Home & Property
Suffolk Shore Work Needs a Tidal Wetlands Question
A Suffolk shoreline project should check DEC tidal wetland maps and permit rules before clearing, filling, bulkhead, dock, or septic plans move ahead.
Read this note ->Suffolk County · Money & Taxes
Brookhaven tax payments start with the town Receiver
Brookhaven property owners should start tax-payment questions with the town Receiver pages, then separate county, school, and local timing.
Read this note ->Property tax snapshot
About $3–$27 per $1,000 in Suffolk County
Combined full-value rate — county + town/city + school district, per $1,000 of market value (FY2025). On a $300,000 home that's about $800–$8,201 a year before the STAR break. A hamlet has no government of its own — it's taxed at the rates of the town it sits in.
A planning estimate, not a bill. Your exact rate depends on your school district and any village. Confirm with the assessor.
Statewide links
Statewide starting points.
Good to know
- • Your assessed value usually isn't your market value — ask for the equalization rate.
- • Register for STAR; new applicants generally receive a credit instead of an automatic exemption on the bill.
- • Outside the cities, check the well, the septic, and the FEMA flood map before you buy.
Nearby
Nearby places
Tax rates: NYS Dept of Taxation & Finance (ORPTS), Real Property Tax Rates and Levy Data by Municipality, data.ny.gov dataset iq85-sdzs. (FY2025). Population: U.S. Census 2020. Reviewed June 2026. Source data ->
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