New answers tagged demography
From IPUMS (click on "case count" here) we have the number of farm and nonfarm households in the United States from 1850 onwards (note comparability problems after 1950). In their 1% sample of the 1850 census, more than half of households are non-farm. However, the groups are close to equal size, so we can expect the equal split (in households) to have taken ...
To comply the comments I rewrote: While this is not a direct demographic data, GDP by industry can be a good indicator where the jobs are. Agriculture is primarily farms based, industry, service is primarily urban. It may not give an exact 50% point, but gives an idea. Also, the reason behind the demographic change is the shift of economy and majority of ...
From the US Census, 1920 was the first census where more than half the population was considered Urban rather than Rural. This might be considered a rough answer to your question. Source
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