Masc singular | Fem singular | Masc plural | Fem plural | |
1st | primero / primer* | primera | primeros | primeras |
2nd | segundo | segunda | segundos | segundas |
3rd | tercero / tercer* | tercera | terceros | terceras |
4th | cuarto | cuarta | cuartos | cuartas |
5th | quinto | quinta | quintos | quintas |
6th | sexto | sexta | sextos | sextas |
7th | séptimo | séptima | séptimos | séptimas |
8th | octavo | octava | octavos | octavas |
9th | noveno | novena | novenos | novenas |
10th | décimo | décima | décimos | décimas |
* = when followed by masculine singular noun.
Ordinal numbers in Spanish are adjectives and have to agree with the noun they are describing, i.e. masculine (singular or plural) and feminine (singular and plural).