Which U.S. Presidents Owned Slaves?

Back in 2007, Jennie wrote Grant was a Slave Owner. As a follow up, I would like to highlight Which U.S. Presidents Owned Slaves?

The above site is by Rob Lopresti. He is a librarian and mystery writer who works at Western Washington University. I recently meet Rob when I was visiting campus and he told me about his site.

Here are the first sentences from the site:

How many presidents owned slaves? It ought to be a simple question but a search on the web produces a lot of contradictory answers. One reason is that there are really two questions: 1. How many presidents owned slaves during their lives? 2. How many presidents owned slaves while they were president? In the table below I attempt to answer both questions. I have also included selected quotations from the presidents and relevant actions they took.

Here are some additional sections of the site:

Were they just “Men of their time?”
Ranking the Presidents
The Slave-owners in Your Wallet
Bibliography (Citations)

This looks well researched and worth visiting.