A new Gallup survey shows declining patriotism across generations, with Gen Z showing the lowest levels of national pride, as overall American pride hits a record-low ahead of July 4.

The Gallup poll's findings are a stark illustration of how many — but not all — Americans have felt less of a sense of pride in their country over the past decade.

The share of Americans who say they’re “extremely” or “very” proud to be an American slipped 9 points from last year, falling ...