Thomas Mifflin , the incumbent President of the Supreme Executive Council of the Commonwealth of Pennsylvania was elected as the first Governor of Pennsylvania .
The Pennsylvania gubernatorial election of 1790 was the first gubernatorial election after the establishment of the Commonwealth of Pennsylvania as a U.S. state .
Thomas Mifflin , the incumbent President of the Supreme Executive Council of the Commonwealth of Pennsylvania was elected as the first Governor of Commonwealth of Pennsylvania .
The Pennsylvania gubernatorial election of 1790 was the first gubernatorial election after the establishment of the Commonwealth of Pennsylvania as a U.S. state .