the u.s. largest economies list
#1 California GDP 40% Bigger Than #2 Texas. With an estimated $2.31 trillion of GDP in 2014, California has the largest state-level economy in the U.S. due largely to its population, which ranks 1st among U.S. states. Texas ranks 2nd at $1.65 trillion. This means that California's 2014 GDP was 40% bigger than that of Texas.