diff --git a/docs/_static/custom.css b/docs/_static/custom.css
index 1b5cd7e..6b02f39 100644
--- a/docs/_static/custom.css
+++ b/docs/_static/custom.css
@@ -2,6 +2,9 @@
 a { text-decoration: underline; }
 .wy-menu-vertical a, .wy-side-nav-search > a { text-decoration: none; }
 
+/* Make the logo more reasonably sized. */
+.wy-side-nav-search > a img.logo { width: 200px; }
+
 /* Some of our section titles are looong */
 .wy-nav-side, .wy-side-scroll, .wy-menu-vertical { width: 340px; }
 .wy-side-nav-search { width: 325px; }
diff --git a/docs/_static/logo.png b/docs/_static/logo.png
new file mode 100644
index 0000000..cb2e7cf
Binary files /dev/null and b/docs/_static/logo.png differ
diff --git a/docs/conf.py b/docs/conf.py
index aa8950a..a51949e 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -43,6 +43,7 @@ napoleon_custom_sections = ["Platform overrides"]
 html_theme = "sphinx_rtd_theme"
 html_static_path = ["_static"]
 html_css_files = ["custom.css"]
+html_logo = "_static/logo.png"
 
 rst_prolog = """
 .. role:: pc(code)