1到100的序数词，第一(first缩写1st)，第二(second缩写2nd)，第三(third缩写3nd)需要特殊记忆，4到19都是基数词加后缀th构成，但要注意第5，第8，第9，第12的拼写变化。20到99的整十位数序数词是对应的基数词词尾的y变为i然后加eth构成，非整 十位数序数词 十位数仍用基数词，个位数则用相应的序数词，十位数与个位数之间用“-”连接。
1-10 的序数词
| 1st first | 2nd second |
| 3rd third | 4th fourth |
| 5th fifth | 6th sixth |
| 7th seventh | 8th eighth |
| 9th ninth | 10th tenth |
11-20 的序数词
| 11th eleventh | 12th twelfth |
| 13th thirteenth | 14th fourteenth |
| 15th fifteenth | 16th sixteenth |
| 17th seventeenth | 18th eighteenth |
| 19th nineteenth | 20th twentieth |
21-30 的序数词
| 21st twenty-first | 22nd twenty-second |
| 23rd twenty-third | 24th twenty-fourth |
| 25th twenty-fifth | 26th twenty-sixth |
| 27th twenty-seventh | 28th twenty-eighth |
| 29th twenty-ninth | 30th thirtieth |
31-40 的序数词
| 31st thirty-first | 32nd thirty-second |
| 33rd thirty-third | 34th thirty-fourth |
| 35th thirty-fifth | 36th thirty-sixth |
| 37th thirty-seventh | 38th thirty-eighth |
| 39th thirty-ninth | 40th fortieth |
41-50 的序数词
| 41st forty-first | 42nd forty-second |
| 43rd forty-third | 44th forty-fourth |
| 45th forty-fifth | 46th forty-sixth |
| 47th forty-seventh | 48th forty-eighth |
| 49th forty-ninth | 50th fiftieth |
51-60 的序数词
| 51st fifty-first | 52nd fifty-second |
| 53rd fifty-third | 54th fifty-fourth |
| 55th fifty-fifth | 56th fifty-sixth |
| 57th fifty-seventh | 58th fifty-eighth |
| 59th fifty-ninth | 60th sixtieth |
61-70 的序数词
| 61st sixty-first | 62nd sixty-second |
| 63rd sixty-third | 64th sixty-fourth |
| 65th sixty-fifth | 66th sixty-sixth |
| 67th sixty-seventh | 68th sixty-eighth |
| 69th sixty-ninth | 70th seventieth |
71-80 的序数词
| 71st seventy-first | 72nd seventy-second |
| 73rd seventy-third | 74th seventy-fourth |
| 75th seventy-fifth | 76th seventy-sixth |
| 77th seventy-seventh | 78th seventy-eighth |
| 79th seventy-ninth | 80th eightieth |
81-90 的序数词
| 81st eighty-first | 82nd eighty-second |
| 83rd eighty-third | 84th eighty-fourth |
| 85th eighty-fifth | 86th eighty-sixth |
| 87th eighty-seventh | 88th eighty-eighth |
| 89th eighty-ninth | 90th ninetieth |
91-100 的序数词
| 91st ninety-first | 92nd ninety-second |
| 93rd ninety-third | 94th ninety-fourth |
| 95th ninety-fifth | 96th ninety-sixth |
| 97th ninety-seventh | 98th ninety-eighth |
| 99th ninety-ninth | 100th one hundredth |
百以上的序数词将基数词的结尾部分变为序数词即可。如：
100th one hundredth
204th two hundred and fourth
562th five hundred and sixty-second