The Atlantic gives the net worth of every single American president, one by one:
The fortunes of American presidents are tied to the economy in the eras in which they lived. For the first 75 years after Washington’s election, presidents generally made money on land, crops, and commodity speculation. A president who owned hundreds or thousands of acres could lose most or all of his property after a few years of poor crop yields. Wealthy Americans occasionally lost all of their money through land speculation–leveraging the value of one piece of land to buy additional property. Since there was no reliable national banking system and almost no liquidity in the value of private companies, land was the asset likely to provide the greatest yield, if the property yielded enough to support the costs of operating the farm or plantation.
The Net Worth of the U.S. Presidents: Washington to Obama [The Atlantic]