What to know about ZIP 55903
ZIP code 55903 covers Rochester, MN in Olmsted County.
It sits in telephone area code 507; U.S. House district MN-1; the ROCHESTR - MASON CITY - AUSTIN media market.
Rochester city, MN
ZIP Code 55903 — Rochester city, MN Demographics & Data
Source: U.S. Census Bureau ACS 2019–2023 5-Year Estimates. Page data updated 2026-08-02.
Map, Quick Facts & Location
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At a glance
Overview of ZIP Code 55903
Climate risk and migration signals
FEMA’s National Risk Index rates natural-hazard risk for Rochester city, MN as Relatively Moderate (composite score 82.3), which is elevated versus much of the country. The strongest component scores on US5 are flood (86.9) and wildfire (20.5). 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 Rochester city, MN show limited published climate normals on US5.