See the below image for the US states economy comparison diagram. For example: America’s largest state economy is California, which produced nearly $3 trillion of economic output in 2018, more than the United Kingdom’s GDP last year of $2.8 trillion. Consider this: California has a labor force of 19.6 million compared to the labor force in the UK of 34 million ( World Bank data here ).
The first map shows seven areas of the US that have the same GDP as entire countries. It shows that California has the same size economy as France. Both have nearly $2.54 trillion in output.
The economy of the north-east states – Massachusetts and Pennsylvania up to Maine and including New York – amounts to $4.2 trillion, similar to Japan’s at $4.12 trillion. Florida and Alabama, with $1.087 trillion in GDP, almost match Mexico at $1.14 trillion, while Texas’s economy, $1.59 trillion, is close to that of Brazil at $1.74 trillion.