Rivers Bordering New York: Three Majors, Not Four

New York State is bordered by three major rivers—not four. The claim of four likely conflates border rivers with major internal rivers.

🗺️ The Three Border Rivers

Note: The Hudson forms the NY/NJ border only from NYC to the NY/CT/MA tri-point. North of there, it's entirely within NY.

🚫 The "Fourth" Candidates (Internal, Not Borders)

• Mohawk River: Major Hudson tributary — **entirely within NY** (Rome → Cohoes). Erie Canal follows it.
• Genesee River: PA → NY → Lake Ontario (Rochester) — internal.
• Delaware River: Borders **PA & NJ** — touches NY only at **tri-point (Port Jervis)**; not a NY border.
• Susquehanna / Chemung / Allegheny: Headwaters in NY — flow to PA/MD.

💧 Other Border Waters

• Lake Erie / Lake Ontario: Water borders (Canada).
• Lake Champlain: Border with Vermont (narrow NE corner).
• Long Island Sound: Border with CT (north shore of LI).
• Atlantic Ocean: South shore of Long Island.

**Three rivers form NY's interstate/international borders:** Hudson, Niagara, St. Lawrence. The Mohawk is its mightiest *internal* river.