Ordinal Numbers 1-30 in Spanish

Ordinal numbers are numbers that show the order of a serious of nouns. Like cardinal number, ordinal numbers can also function as adjectives when they modify a noun. However, unlike cardinal numbers, ordinal numbers must match the noun they modify in gender and number. Oridinal numbers almost always go before the noun.

Basic Ordinal Numbers

The following are the basic ordinal numbers 1st-30th in Spanish.
English
Spanish
first
1st
primero (primer)
second
2nd
segundo
third
3rd
tercero (tercer)
fourth
4th
cuarto
fifth
5th
quinto
sixth
6th
sexto
seventh
7th
séptimo
eighth
8th
octavo
ninth
9th
noveno
tenth
10th
décimo
10°
eleventh
11th
undécimo
11°
twelfth
12th
duodécimo
12°
thirteenth
13th
decimotercero
13°
fourteenth
14th
decimocuarto
14°
fifteenth
15th
decimoquinto
15°
sixteenth
16th
decimosexto
16°
seventeenth
17th
decimoséptimo
17°
eighteenth
18th
decimoctavo
18°
nineteenth
19th
decimonoveno
19°
twentieth
20th
vigésimo
20°
twenty first
21st
vigésimo primer(o)
21°
twenty second
22nd
vigésimo segundo
22°
twenty third
23rd
vigésimo tercer(o)
23°
twenty fourth
24th
vigésimo cuarto
24°
twenty fifth
25th
vigésimo quinto
25°
twenty sixth
26th
vigésimo sexto
26°
twenty seventh
27th
vigésimo séptimo
27°
twenty eighth
28th
vigésimo octavo
28°
twenty nineth
29th
vigésimo noveno
29°
thirtieth
30th
trigésimo
30°

Ordinal Numbers 1st-12th

Ordinal numbers 1st-12th are all unique and must be memorized. For 11th and 12th in Spanish, decimoprimero and decimosegundo are also acceptable forms.

Ordinal Numbers 13th-19th

Ordinal numbers 13th-19th are unique in that each is written as a single word. However, it's also acceptable to write these numbers as separate words. These ordinal numbers are formed using the following formula: multiple of ten (minus any written accents) + 1st-9th. 18th is the only ordinal number that does not follow this pattern since the -o is removed from décimo before adding octavo. Consider the following examples:

  • 13th - décimo + tercero = decimotercero (or décimo tercero)
  • 15th - décimo + quinto = decimoquinto (or décimo quinto)
  • 19th - décimo + noveno = decimonoveno (or décimo noveno)



Ordinal Numbers 21st-99th

Ordinal numbers 21st-99th are are simply written out as a two separate words. Consider the following examples.

  • 22nd - vigésimo + segundo = vigésimo primero
  • 33rd - trigésimo + tercero = trigésimo tercero
  • 98th - nonagésimo + octavo = nonagésimo octavo