diff --git a/strictyaml/scalar.py b/strictyaml/scalar.py
index cb6e33f..ca67d65 100644
--- a/strictyaml/scalar.py
+++ b/strictyaml/scalar.py
@@ -209,6 +209,23 @@ def to_yaml(self, data):
         raise YAMLSerializationError("'{}' not a hexademial integer.".format(data))
 
 
+class OctInt(ScalarValidator):
+    def validate_scalar(self, chunk):
+        val = chunk.contents
+        if not utils.is_octal(val):
+            chunk.expecting_but_found("when expecting an octal integer")
+        return int(val, 8)
+
+    def to_yaml(self, data):
+        if utils.is_octal(data):
+            if isinstance(data, int):
+                return oct(data)
+            else:
+                return data
+        raise YAMLSerializationError("'{}' not an octal integer.".format(data))
+
+
+
 class Bool(ScalarValidator):
     def validate_scalar(self, chunk):
         val = chunk.contents
diff --git a/strictyaml/utils.py b/strictyaml/utils.py
index 32ce5e0..b6fdbe8 100644
--- a/strictyaml/utils.py
+++ b/strictyaml/utils.py
@@ -79,6 +79,31 @@ def is_integer(value):
     return compile(r"^[-+]?[0-9_]+$").match(value) is not None
 
 
+def is_octal(value):
+    """
+    Is a string a string of a octal integer?
+
+    >>> is_octal("0o15")
+    True
+
+    >>> is_octal("0O15")
+    True
+
+    >>> is_octal("0o19")
+    False
+
+    >>> is_octal("o15")
+    False
+
+    >>> is_octal("16")
+    False
+
+    >>> is_octal("1")
+    False
+    """
+    return compile(r"^0[oO][0-7]+$").match(value) is not None
+
+
 def is_hexadecimal(value):
     """
     Is a string a string of a hexademcial integer?