What to know about ZIP 01561
ZIP code 01561 covers South Lancaster, MA in Worcester County.
It sits in telephone area codes 351, 978; U.S. House district MA-3; the BOSTON (MANCHESTER) media market.
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South Lancaster CDP, MA
ZIP Code 01561 — South Lancaster CDP, MA Demographics & Data
Source: U.S. Census Bureau ACS 2019–2023 5-Year Estimates. Page data updated 2026-08-02.
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At a glance
Overview of ZIP Code 01561
Climate risk and migration signals
FEMA’s National Risk Index rates natural-hazard risk for South Lancaster CDP, MA as Relatively Moderate (composite score 93.5), which is among the highest nationally. The strongest component scores on US5 are hurricane (96.6) and flood (95.3). These scores are county-linked NRI values published for planning context — all ZIP codes in the same county share the same composite score on US5. Useful when comparing insurance and disaster exposure across areas, not a substitute for a parcel-level flood or fire determination.
Climate normals for South Lancaster CDP, MA show little to no average snow and around 43.4 inches of annual precipitation.
Nearby (from this ZIP)
Airport ORH (15.6 miles (25.1 km)) · Quinsigamond Community College (10.6 miles (17.0 km)) · Minute Man National Historical Park (19.3 miles (31.1 km)) · VA: Woodlawn Cemetery Soldiers' Lot (9.4 miles (15.2 km))
Full lists and map pins are in the Infrastructure section below.