Urban areas are based off of 2.5k people in an area…I own a 200+ acre farm and have to drive 30mins (17miles) to the nearest grocery store…I am included in this urban classification…thats how the census is based.
Do you live in a census block with an average of 200 houses per square mile? Then you’re outside the urban area. 200 houses evenly spaced is 3.2 acre lots on average.
https://www2.census.gov/geo/pdfs/reference/ua/Census_UA_2020FAQs_Feb2023.pdf
To qualify as an urban area, the territory identified according to criteria must encompass at least 2,000 housing units or at least 5,000 people.
They also base it off of 50k or more people, so if your county has 50k or more you’re considered urbanized. My county has 56k people and multiple areas of farmland that was converted into subdivisions. This has our area marked as urban. Most people around my state will call my county and location as rural, but the census bureau says we’re urban.