What city is ZIP code 17778?

ZIP code 17778 is in Sinnamahoning, PA (Clinton County).

What county is ZIP code 17778 in?

ZIP code 17778 is mostly in Clinton County, Pennsylvania.

How many people live in ZIP code 17778?

About 74 people live in the 17778 ZIP Code Tabulation Area, based on American Community Survey 5-year estimates.

Checked Oct 26, 2026

ZIP Code 17778

Sinnamahoning, PA, Clinton County

Population

Land area

73.5sq mi

People per sq mi

City

Sinnamahoning

ZIP 17778 and nearby ZIP codes

Full map

ZIP 17778 at a glance

ZIP 17778 (Sinnamahoning) is 100% less dense than Pennsylvania as a whole.

Environment and hazard risk

ZIP 17778, from FEMA, NOAA and EPA

Full report

Natural hazard risk

Relatively Low

Top: strong wind

Storm events since 1996

557

Countywide, mostly thunderstorm wind

Flood insurance policies

336

2.2% of homes, county

July high / Jan low

82° / 18°F

Hazards, floods and storm history Check a flood zone

Frequently asked questions

What city is ZIP code 17778?: ZIP code 17778 is in Sinnamahoning, PA (Clinton County).
What county is ZIP code 17778 in?: ZIP code 17778 is mostly in Clinton County, Pennsylvania.
How many people live in ZIP code 17778?: About 74 people live in the 17778 ZIP Code Tabulation Area, based on American Community Survey 5-year estimates.

Source: U.S. Census Bureau (ZIP Code Tabulation Areas, American Community Survey) · Data as of 12/31/2023. ZIP Code Tabulation Areas closely match, but are not identical to, USPS ZIP code delivery areas.