{| class="wikitable" border="1"|- valign="top"! Ph.D. Programs by Number of Relevant Faculty! Ph.D. Programs by Country! Ph.D. Programs by State|- valign="top"| <categorytree mode=pages>1 Faculty</categorytree>
<categorytree mode=pages>2 Faculty</categorytree>
<categorytree mode=pages>3 Faculty</categorytree>
<categorytree mode=pages>5 Faculty</categorytree>
<categorytree mode=pages>6+ Faculty</categorytree>
| <categorytree mode=pages>Australasia</categorytree>
<categorytree mode=pages>Canada</categorytree>
<categorytree mode=pages>United Kingdom</categorytree>
<categorytree mode=pages>United States</categorytree>
| <categorytree mode=pages>Arizona</categorytree>
<categorytree mode=pages>California</categorytree>
<categorytree mode=pages>Florida</categorytree>
<categorytree mode=pages>Illinois</categorytree>
<categorytree mode=pages>Indiana</categorytree>
<categorytree mode=pages>Maryland</categorytree>
<categorytree mode=pages>Massachusetts</categorytree>
<categorytree mode=pages>Michigan</categorytree>
<categorytree mode=pages>Minnesota</categorytree>
<categorytree mode=pages>New York</categorytree>
<categorytree mode=pages>North Carolina</categorytree>
<categorytree mode=pages>Ohio</categorytree>
<categorytree mode=pages>Pennsylvania</categorytree>
<categorytree mode=pages>Texas</categorytree>
<categorytree mode=pages>Utah</categorytree>
<categorytree mode=pages>Wisconsin</categorytree>
|-
|}