diff --git a/num2words/lang_KO.py b/num2words/lang_KO.py
index 65f4531e..4664533f 100644
--- a/num2words/lang_KO.py
+++ b/num2words/lang_KO.py
@@ -20,6 +20,8 @@
 from .base import Num2Word_Base
 from .currency import parse_currency_parts
 
+import re
+
 
 class Num2Word_KO(Num2Word_Base):
     CURRENCY_FORMS = {
@@ -93,27 +95,26 @@ def merge(self, lpair, rpair):
 
     def to_ordinal(self, value):
         self.verify_ordinal(value)
-        if value == 1:
-            return "첫 번째"
         outwords = self.to_cardinal(value).split(" ")
-        lastwords = outwords[-1].split("백")
-        if "십" in lastwords[-1]:
-            ten_one = lastwords[-1].split("십")
-            ten_one[0] = self.ords[ten_one[0] + "십"]
-            try:
-                ten_one[1] = self.ords[ten_one[1]]
-                ten_one[0] = ten_one[0].replace("스무", "스물")
-            except KeyError:
-                pass
-            lastwords[-1] = ''.join(ten_one)
-        else:
-            lastwords[-1] = self.ords[lastwords[-1]]
-        outwords[-1] = "백 ".join(lastwords)
-        return " ".join(outwords) + " 번째"
+        if value % 100 != 0:
+            re_mid_words = '|'.join('(?<={})'.format(re.escape(delim)) 
+                for delim in ['천', '백'])
+            lastwords = re.split(re_mid_words, outwords[-1])
+            if "십" in lastwords[-1]:
+                ten_one = lastwords[-1].split("십")
+                ten_one[0] = self.ords.get(ten_one[0] + "십", ten_one[0] + "십")
+                ten_one[1] = self.ords.get(ten_one[1], ten_one[1])
+                if not ten_one[1]:
+                    ten_one[0] = ten_one[0].replace("스물", "스무")
+                lastwords[-1] = ''.join(ten_one)
+            else:
+                lastwords[-1] = self.ords.get(lastwords[-1], lastwords[-1])
+            outwords[-1] = ''.join(lastwords)
+        return ' '.join(x.strip() for x in outwords if x.strip())
 
     def to_ordinal_num(self, value):
         self.verify_ordinal(value)
-        return "%s 번째" % (value)
+        return "%s" % (value)
 
     def to_year(self, val, suffix=None, longval=True):
         if val < 0:
diff --git a/tests/test_ko.py b/tests/test_ko.py
index c98ad881..357bf13e 100644
--- a/tests/test_ko.py
+++ b/tests/test_ko.py
@@ -82,12 +82,17 @@ def test_currency(self):
             n2k(4, to="currency", currency="EUR")
 
     def test_ordinal(self):
-        cases = [(1, "첫 번째"), (101, "백 한 번째"), (2, "두 번째"), (5, "다섯 번째"),
-                 (10, "열 번째"), (25, "스물다섯 번째"), (137, "백 서른일곱 번째")]
+        cases = [(1, "한"), (101, "백한"), (2, "두"), (5, "다섯"), (1050, "천쉰"),
+                 (10, "열"), (20, "스무"), (21, "스물한"), (100, "백"),
+                 (1000, "천"), (10000, "만"), (100000, "십만"), (1000000, "백만"),
+                 (100001, "십만 한"),(10000000, "천만"), (100000000, "일억"),
+                 (1000000000, "십억"),(10000000000, "백억"),
+                 (100000000000, "천억"), (1000000000000, "일조"),
+                 (10000000000000, "십조"), (25, "스물다섯"), (137, "백서른일곱")]
         for num, out in cases:
             self.assertEqual(n2k(num, to="ordinal"), out)
 
     def test_ordinal_num(self):
-        cases = [(1, "1 번째"), (101, "101 번째"), (25, "25 번째")]
+        cases = [(1, "1"), (101, "101"), (25, "25")]
         for num, out in cases:
             self.assertEqual(n2k(num, to="ordinal_num"), out)