Nason

Illinois · IL

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About Nason

City in Illinois, United States

1923Established

199Population

0.9 sq miArea

436 ftElevation

Nason is a city in Jefferson County, Illinois, United States. The population was 199 people as of the 2020 census, making it the least populous incorporated city in the state of Illinois. It is part of the Mount Vernon Micropolitan Statistical Area.

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The weekly

This week in Nason

September 14–20, 2026·Illinois · IL

A Heat Advisory is in effect, with Mostly Clear.

Gathered from local news, the National Weather Service, and your neighbors’ posts.

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From your neighbors

What’s happening

Will M.

2h · Townwide

PhotoAround town

Sunset over Nason last night

Caught this from the ridge on my walk. Had to share — one of those skies that makes you stop.

7 Save

Maya H.

5h · Townwide

Neighbors

Lost dog near Townwide — please keep an eye out

Small brown terrier, very friendly, answers to Scout. Slipped the leash this morning. Any sightings appreciated.

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ZIP code62866