diff --git a/flags/sealand.svg b/flags/sealand.svg
new file mode 100644
index 0000000..831fefa
--- /dev/null
+++ b/flags/sealand.svg
@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="512" height="512" viewBox="0 0 512 512"><mask id="a"><circle cx="256" cy="256" r="256" fill="#fff"/></mask><g mask="url(#a)"><path fill="#eee" d="M512 0v160L368 368 160 512H0l224-288Z"/><path fill="#d80027" d="M0 512 512 0H0Z"/><path fill="#333" d="M512 160 160 512h352z"/></g></svg>
\ No newline at end of file
diff --git a/gallery.md b/gallery.md
index 1cd12d4..feb48f7 100644
--- a/gallery.md
+++ b/gallery.md
@@ -324,6 +324,7 @@ https://hatscripts.github.io/circle-flags/flags/xx.svg
   <div><img src="flags/sc.svg" width="96"/><p>Seychelles (<code>sc</code>)</p></div>
   <div><img src="flags/sd.svg" width="96"/><p>Sudan (<code>sd</code>)</p></div>
   <div><img src="flags/se.svg" width="96"/><p>Sweden (<code>se</code>)</p></div>
+  <div><img src="flags/sealand.svg" width="96"/><p>Sealand</p></div>
   <div><img src="flags/sg.svg" width="96"/><p>Singapore (<code>sg</code>)</p></div>
   <div><img src="flags/sh-ac.svg" width="96"/><p>Ascension Island (<code>sh-ac</code>)</p></div>
   <div><img src="flags/sh-hl.svg" width="96"/><p>Saint Helena (<code>sh-hl</code>)</p></div>