diff --git a/contents/graham_scan/code/ruby/graham_scan.rb b/contents/graham_scan/code/ruby/graham_scan.rb
new file mode 100644
index 000000000..804fb561e
--- /dev/null
+++ b/contents/graham_scan/code/ruby/graham_scan.rb
@@ -0,0 +1,52 @@
+def graham_scan(points)
+  # First, sort the points so the one with the lowest y-coordinate comes first (the pivot)
+  points = points.sort_by { |point| point[:y] }
+  pivot = points[0]
+
+  # Then sort all remaining points based on the angle between the pivot and itself
+  hull = points.slice(1..-1).sort { |a, b| polar_angle(a, pivot) - polar_angle(b, pivot) }
+
+  # The pivot is always on the hull
+  hull.unshift(pivot)
+
+  n = hull.length
+  m = 1
+  (2...n).each do |i|
+    while ccw(hull[m - 1], hull[m], hull[i]) <= 0
+      if m > 1
+        m -= 1
+      elsif m == i
+        break
+      else
+        i += 1
+      end
+    end
+
+    m += 1
+    hull[i], hull[m] = [hull[m], hull[i]]
+  end
+
+  hull.slice(0...m + 1)
+end
+
+def polar_angle(a, b)
+  Math.atan2(a[:y] - b[:y], a[:x] - b[:x])
+end
+
+def ccw(a, b, c)
+  (b[:x] - a[:x]) * (c[:y] - a[:y]) - (c[:x] - a[:x]) * (b[:y] - a[:y])
+end
+
+points = [
+  { x: 1, y: 3 },
+  { x: 2, y: 4 },
+  { x: 4, y: 0 },
+  { x: 1, y: 0 },
+  { x: 0, y: 2 },
+  { x: 2, y: 2 },
+  { x: 3, y: 4 },
+  { x: 3, y: 1 }
+]
+
+convex_hull = graham_scan(points)
+convex_hull.each { |p| puts("(#{p[:x]}, #{p[:y]})") }
diff --git a/contents/graham_scan/graham_scan.md b/contents/graham_scan/graham_scan.md
index e0323d961..d53eb1b85 100644
--- a/contents/graham_scan/graham_scan.md
+++ b/contents/graham_scan/graham_scan.md
@@ -28,6 +28,8 @@ We can find whether a rotation is counter-clockwise with trigonometric functions
 [import:27-29, lang:"java"](code/java/GrahamScan.java)
 {% sample lang="cpp" %}
 [import:10-12, lang="cpp"](code/c++/graham_scan.cpp)
+{% sample lang="ruby" %}
+[import:36-38, lang:"ruby"](code/ruby/graham_scan.rb)
 {% endmethod %}
 
 If the output of this function is 0, the points are collinear.
@@ -58,6 +60,8 @@ In the end, the code should look something like this:
 [import:35-70, lang:"java"](code/java/GrahamScan.java)
 {% sample lang="cpp" %}
 [import:14-47, lang="cpp"](code/c++/graham_scan.cpp)
+{% sample lang="ruby" %}
+[import:1-30, lang:"ruby"](code/ruby/graham_scan.rb)
 {% endmethod %}
 
 ### Bibliography
@@ -83,6 +87,8 @@ In the end, the code should look something like this:
 [import, lang:"java"](code/java/GrahamScan.java)
 {% sample lang="cpp" %}
 [import, lang="cpp"](code/c++/graham_scan.cpp)
+{% sample lang="ruby" %}
+[import, lang:"ruby"](code/ruby/graham_scan.rb)
 {% endmethod %}
 
 <script>