Ordinal numbers answer the question który? / która? / które? — "which one (in order)?". In English an ordinal like "fifth" never changes shape. In Polish, piąty is a full adjective: it agrees with its noun in gender, number, and case, exactly like nowy "new" or dobry "good". This single fact is the key to the whole page — once you accept that "fifth" behaves like an adjective, every form follows from rules you already know.
The basic forms (masculine, the citation form)
The dictionary form of an ordinal is the masculine singular nominative — the form you would read off a list.
| Number | Ordinal (m.) | English |
|---|---|---|
| 1 | pierwszy | first |
| 2 | drugi | second |
| 3 | trzeci | third |
| 4 | czwarty | fourth |
| 5 | piąty | fifth |
| 6 | szósty | sixth |
| 7 | siódmy | seventh |
| 8 | ósmy | eighth |
| 9 | dziewiąty | ninth |
| 10 | dziesiąty | tenth |
Notice the diacritics: piąty, szósty, siódmy, ósmy, dziewiąty all carry the marks that distinguish them from look-alike spellings. Dropping the ó in szósty or the ą in piąty is a spelling error, not a typo.
They agree like adjectives
Because ordinals are adjectives, they take the gender of the noun they describe. Compare these three nouns of different gender:
To jest mój pierwszy dzień w nowej pracy.
This is my first day at the new job.
Piąta lekcja jest najtrudniejsza.
The fifth lesson is the hardest.
Drugie piętro jest na samej górze.
The second floor is right at the top.
Dzień is masculine, so we get pierwszy. Lekcja is feminine, so the ordinal becomes piąta. Piętro is neuter, so it is drugie. The endings — masculine -y/-i, feminine -a, neuter -e — are the ordinary adjective endings. If you already know that nowy / nowa / nowe tracks gender, you already know how ordinals agree.
The plural works the same way, including the special masculine-personal plural (used for groups including men):
Zajęli pierwsze miejsca w konkursie.
They took the first places in the competition.
To są nasi pierwsi goście.
These are our first guests.
They decline through all the cases
The agreement does not stop at gender. Because an ordinal is an adjective, it also changes case along with its noun. The most common place A2 learners meet this is the locative after location prepositions — "on the fifth floor", "in the third row":
Mieszkam na pierwszym piętrze.
I live on the first floor.
Siedzieliśmy w piątym rzędzie.
We were sitting in the fifth row.
Wysiadam na trzecim przystanku.
I get off at the third stop.
Here pierwszy → pierwszym, piąty → piątym, trzeci → trzecim — the locative singular masculine/neuter adjective ending -ym/-im. The same logic produces o piątej "at five o'clock" (locative feminine), which you can explore on the telling the time page. For the full set of adjective endings across all six cases, see adjective declension.
Compound ordinals — every word is an ordinal
For numbers above twenty, Polish builds the ordinal from two or three words, and crucially each element is itself an ordinal and each one inflects. Unlike compound cardinals (where, say, the noun count is driven by the last element), in a compound ordinal the tens, the units — and the hundreds, if present — all carry ordinal endings and all agree with the noun:
| Number | Ordinal | English |
|---|---|---|
| 20 | dwudziesty | twentieth |
| 21 | dwudziesty pierwszy | twenty-first |
| 30 | trzydziesty | thirtieth |
| 100 | setny | hundredth |
| 1000 | tysięczny | thousandth |
To już dwudziesta pierwsza rocznica ich ślubu.
It's already the twenty-first anniversary of their wedding.
Skończył dwudzieste piąte urodziny.
He turned twenty-five (lit. completed his twenty-fifth birthday).
Note how in dwudziesta pierwsza both words inflect for feminine gender to agree with rocznica. When the whole compound goes into another case, both halves move together: przed dwudziestym pierwszym "before the twenty-first".
Writing ordinals: the period rule
In Polish an ordinal written as a digit takes a period: 5. is read piąty, not the cardinal pięć. The period is the ordinal marker — the equivalent of English "-th" or "5th".
Mieszkam na 3. piętrze.
I live on the 3rd floor.
W 1. rzędzie nie ma już wolnych miejsc.
In the 1st row there are no free seats left.
You may omit the period only when context makes the ordinal unmistakable, for example in a date written 5 maja — but the safe, standard form puts the period. See writing numerals, dates, and abbreviations for the full conventions.
Dates: the genitive ordinal
This is the point where ordinals trip up almost every learner. To say "on the fifth of May", Polish puts the day in the genitive ordinal and the month in the genitive too:
Urodziłem się piątego maja.
I was born on the fifth of May.
Egzamin jest dwudziestego trzeciego czerwca.
The exam is on the twenty-third of June.
Piąty → piątego is the masculine genitive ending -ego (the day is understood as masculine dzień). There is no preposition for "on" with dates — the bare genitive carries the meaning "on the Nth". This is genuinely different from English, which needs "on", and from the location use, which needs a preposition. The full story lives on the genitive dates and time page.
Common Mistakes
❌ To jest mój piąty lekcja.
Incorrect — feminine noun needs the feminine ordinal.
✅ To jest moja piąta lekcja.
This is my fifth lesson.
The ordinal must agree in gender. Lekcja is feminine, so piąty becomes piąta (and mój becomes moja). English speakers forget this because "fifth" never changes.
❌ Mieszkam na piąty piętrze.
Incorrect — the ordinal must be in the locative after na.
✅ Mieszkam na piątym piętrze.
I live on the fifth floor.
A location preposition forces the locative case onto the ordinal too, not just the noun.
❌ Urodziłem się piąty maja.
Incorrect — a date needs the genitive ordinal.
✅ Urodziłem się piątego maja.
I was born on the fifth of May.
Leaving the ordinal in the nominative for a date is a transfer from English, where the form never changes.
❌ Mieszkam na 5 piętrze.
Incorrect (ambiguous) — a written ordinal needs the period.
✅ Mieszkam na 5. piętrze.
I live on the 5th floor.
Without the period, 5 reads as the cardinal pięć, which would be ungrammatical here.
❌ To nasz pierwszy goście.
Incorrect — masculine-personal plural needs the special form.
✅ To nasi pierwsi goście.
These are our first guests.
A plural noun referring to people (including men) triggers the masculine-personal plural ending -i: pierwszy → pierwsi.
Key Takeaways
- Ordinals are adjectives: they agree in gender, number, and case.
- pierwszy and drugi are suppletive; from piąty up the forms are regular hard-stem adjectives, with trzeci as a soft-stem.
- In compounds, every part is an ordinal and every part agrees (dwudziesta pierwsza, przed dwudziestym pierwszym).
- Written ordinals take a period (
5. = piąty). - Floors/rows = locative (na piątym piętrze); dates = genitive (piątego maja) — never confuse the two.
Now practice Polish
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Start learning Polish→Related Topics
- Genitive for Dates and TimeB1 — How Polish uses the genitive — with no preposition — to express dates, years, ranges, and the 'half past' clock time.
- Writing Numbers, Dates, and AbbreviationsA2 — How Polish writes ordinals, dates, times, and the high-frequency abbreviations — and why the month in a date is always genitive.
- Full Adjective Declension TablesA2 — The complete adjective paradigm across all seven cases and both numbers — and why it's the most regular, learnable part of the Polish case system.
- Telling the TimeA2 — Reading the clock in Polish — feminine ordinals for hours, o + locative for 'at', and the 'half to the next hour' logic.
- Cardinal Numbers 0-20A1 — Learn to count from zero to twenty in Polish, including the gendered forms of 'one' and 'two' and the case shift that begins at five.