The US economy is the second largest in the world behind China. Based on 2015 data, the US GDP is about $18.0 Trillion in terms of Purchasing Power Parity (PPP). At about 321 million, the population of the country is much smaller than China.
The size of the individual states in the US is equal to higher than many countries. The following map shows how each state compares with countries in terms of economy:
Click to enlarge
Source: 11 Reasons Why Everyone Wants to Move to Texas, U.S. Investors
Obviously the above is purely an economic comparison. It does not mean the country of Ireland is equal to a state like Louisiana…..