What Regions Of The US Call It Soda Vs Pop? - Tasting Table
Briefly

The preference of calling carbonated drinks "soda" or "pop" reveals significant regional linguistic differences across the United States, influenced by local vernacular traditions.
A website called Pop vs. Soda has gathered hundreds of thousands of responses, effectively mapping the terminology people use for carbonated soft drinks throughout various regions.
In the South, carbonated soft drinks are commonly referred to as "coke," encompassing all brands and flavors, illustrating another layer of linguistic variation in American food culture.
Regions such as Florida, California, and the Northeast predominantly use the term 'soda,' while those in the West and Midwest favor the term 'pop,' highlighting a fizzy linguistic divide.
Read at Tasting Table
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