Guilderland is a town in Albany County, New York, home to about 37,260 people across 58 square miles. Its ZIP codes are 12009, 12084 and 12085, and parts of 12159, 12186, 12203, 12222, 12303 and 12306 are in Guilderland too.
Homes sold for a median of $233 per square foot across 3 ZIP codes in the three months ending August 2026, and 1 of 3 were seller’s markets.
Mostly Guilderland; also Knox and New Scotland
All in Guilderland
All in Guilderland
Mostly Bethlehem; part is in Guilderland
Mostly New Scotland; part is in Guilderland
Mostly Albany; part is in Guilderland
Mostly Albany; part is in Guilderland
Part is in Guilderland, part in Schenectady and Colonie
Mostly Rotterdam; part is in Guilderland
Each card is that ZIP code’s whole market, including any part outside Guilderland. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Guilderland’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Albany International Airport (ALB)9 miles away |
|---|---|
| Nearest city of 250,000+ | Newark, NJ138 miles away |
| Nearest city of 1 million+ | New York, NY142 miles away |
Straight-line distances from the center of Guilderland; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Guilderland had 36,848 residents in the 2020 census, up 13% since 2000.
It’s the 55th largest of 1,007 towns in New York by population.
Albany County grew from 165,571 residents in 1900 to 314,848 in 2020.
Albany County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 84°F in summer, and winter lows average 16°F. About 40.9 inches of rain and melted snow fall in a typical year, with about 59 inches of snow.
Source: NOAA 1991–2020 climate normals, Albany Ap, NY weather station (9 miles away).
180,421 jobs at 9,465 businesses in Albany County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
117 doctors and other health care providers list an office in Guilderland’s ZIP codes.
Nearest hospitals
Providers with an office here
| Primary care doctors | 6 |
|---|---|
| Specialist doctors | 8 |
| Dentists | 3 |
| Nurse practitioners and physician assistants | 15 |
| Mental health providers | 55 |
| Physical and occupational therapists | 20 |
| Optometrists | 4 |
| Chiropractors | 6 |
| Pharmacies | 3 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (13 nearby)
Grocery stores (4 nearby)
Pharmacies (4 nearby)
Libraries (3 nearby)
Museums (2 nearby)
Theaters and performance venues
Counts are within about 5 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Established in 1700.
Colleges and universities
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by Guilderland Central School District. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Altamont Elementary SchoolAltamont | K–5 | 295 | Public | 2.8 mi |
| Guilderland Elementary SchoolGuilderland | K–5 | 470 | Public | 3.8 mi |
| Farnsworth Middle SchoolGuilderland | 6–8 | 1,186 | Public | 4.2 mi |
| Guilderland High SchoolGuilderland Center | 9–12 | 1,476 | Public | 1.1 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Rotterdam, Albany, Schenectady, Colonie, New Scotland, Bethlehem, Knox, Princetown and Berne.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.