Ordinal Numbers in Russian

In Brief

Russian ordinal numbers answer который? (“which one in order?”): первый (first), второй (second), третий (third). They behave much like adjectives, so their endings agree with the noun in gender, number, and case. In a compound ordinal, normally only the final word is ordinal: двадцать первый этаж (the twenty-first floor).

Overview

Ordinal numbers place people or things in a sequence: the first train, the second attempt, the twenty-third page. Russian calls them порядковые числительные. Unlike English ordinals, which usually keep the same form, a Russian ordinal changes its ending to match the noun it describes. Compare первый этаж (first floor), первая остановка (first stop), and первое место (first place).

This topic is introduced here at B1 because it brings together numbers and adjective agreement. You need ordinals for addresses, floors, dates, school years, chapters, competitions, rulers, centuries, and many ordinary directions. If you already recognize the usual adjective endings, most forms will feel familiar.

A case is a change in a word’s form that shows its role in the sentence or its relationship to another word. Russian ordinals decline for case just as adjectives do: на третьем этаже uses the prepositional case after на to express location, while с третьего этажа uses the genitive after с to express movement from a place.

How It Works

The most useful basic forms

Some common ordinals are irregular or not fully predictable from the corresponding cardinal number. Learn the first few as vocabulary; later forms become more systematic.

Number	Cardinal	Ordinal, masculine singular	English
1	один	первый	first
2	два	второй	second
3	три	третий	third
4	четыре	четвёртый	fourth
5	пять	пятый	fifth
6	шесть	шестой	sixth
7	семь	седьмой	seventh
8	восемь	восьмой	eighth
9	девять	девятый	ninth
10	десять	десятый	tenth
11	одиннадцать	одиннадцатый	eleventh
12	двенадцать	двенадцатый	twelfth
20	двадцать	двадцатый	twentieth
30	тридцать	тридцатый	thirtieth
40	сорок	сороковой	fortieth
100	сто	сотый	hundredth
1,000	тысяча	тысячный	thousandth

The dictionary form is masculine singular, but that is only one possible shape. The noun controls the ending.

Agreement in gender and number

For a typical hard-pattern ordinal such as первый, the nominative forms are:

Gender or number	Form	Example	Meaning
Masculine singular	первый	первый урок	first lesson
Feminine singular	первая	первая глава	first chapter
Neuter singular	первое	первое место	first place
Plural	первые	первые дни	first days

The nominative is the basic case, commonly used for the subject of a sentence and for dictionary forms. Other ordinals follow adjective patterns, but their stems may differ: второй — вторая — второе — вторые; пятый — пятая — пятое — пятые.

Третий follows the soft adjective pattern:

Gender or number	Form	Example
Masculine singular	третий	третий день
Feminine singular	третья	третья неделя
Neuter singular	третье	третье окно
Plural	третьи	третьи места

Notice the soft sign in forms such as третья, третьего, and третьем.

Declension: the ending changes with the case

Here is the full singular pattern for первый. A direct object is the person or thing directly affected by an action; in Russian it often appears in the accusative case.

Case	Masculine	Feminine	Neuter	Typical use
Nominative	первый	первая	первое	basic form or subject
Genitive	первого	первой	первого	“of,” from, dates
Dative	первому	первой	первому	“to/for”
Accusative	первый / первого	первую	первое	direct object
Instrumental	первым	первой	первым	“with/by/as”
Prepositional	первом	первой	первом	after в/на/о in common uses

The two masculine accusative forms depend on animacy—whether the noun refers to a person or animal. Use the nominative-like form with an inanimate noun, Я прочитал первый роман (I read the first novel), but the genitive-like form with an animate noun, Я встретил первого гостя (I met the first guest).

Plural ordinals also decline like plural adjectives:

Case	Form of первый	Example
Nominative	первые	первые уроки
Genitive	первых	после первых уроков
Dative	первым	к первым урокам
Accusative	первые / первых	первые книги / первых гостей
Instrumental	первыми	первыми словами
Prepositional	первых	на первых страницах

You do not need a separate declension system for every ordinal. Once you know adjective endings, attach them to the appropriate ordinal stem: второго, пятому, десятыми, двадцать первой.

Compound ordinal numbers

English marks only the last part of “twenty-first,” and Russian follows a similar principle. In most compound ordinals, all earlier components remain cardinal numbers and only the final component becomes ordinal and declines:

• двадцать один → двадцать первый
• сто тридцать два → сто тридцать второй
• две тысячи двадцать шесть → две тысячи двадцать шестой

Only that final ordinal word agrees with the noun:

• двадцать первая страница — page twenty-one / the twenty-first page
• на сто тридцать втором месте — in 132nd place
• в две тысячи двадцать шестом году — in the year 2026

Do not turn every component into an ordinal. Forms such as двадцатый первый do not mean “twenty-first.” Двадцатый means twentieth by itself.

Exact multiples can have their own ordinal forms, including двухсотый (200th), пятисотый (500th), and тысячный (1,000th). These are best learned when needed; the productive everyday rule remains “change the final component.”

Dates

Russian dates use an ordinal day and the genitive form of the month. There are two important sentence patterns.

When naming today’s date or identifying a date, the day is usually neuter nominative because an understood число (date; literally “number”) is neuter:

• Сегодня пятое марта. — Today is March 5th.
• Завтра будет первое сентября. — Tomorrow will be September 1st.

When saying when something happens, the day normally takes the genitive:

• Мы встретимся пятого марта. — We will meet on March 5th.
• Экзамен будет двадцать первого июня. — The exam will be on June 21st.

Written 5 марта is therefore read пятое марта when it identifies the date, but often пятого марта when it answers “when?” The surrounding sentence determines the case; the digit itself does not show it.

Floors, centuries, and years

Russian counts the ground-level storey as первый этаж, so Russian and American floor numbering often match. British “ground floor” usually corresponds to Russian первый этаж, which can make the English label appear one number lower.

Location on a floor uses на plus the prepositional case: на третьем этаже. Movement to it uses the accusative: на третий этаж. Movement from it uses с plus the genitive: с третьего этажа.

Centuries use an ordinal and are conventionally written with Roman numerals: XXI век is read двадцать первый век. After в meaning “in,” it becomes в двадцать первом веке. Years likewise treat the final number as an ordinal: в 2026 году is read в две тысячи двадцать шестом году.

Examples in Context

Russian	English	Note
Это мой первый день на новой работе.	This is my first day at the new job.	Masculine nominative
Вторая дверь справа ведёт в кухню.	The second door on the right leads to the kitchen.	Feminine nominative
Наша команда заняла третье место.	Our team took third place.	Neuter accusative, same form as nominative
Я живу на третьем этаже.	I live on the third floor.	Prepositional after на for location
Лифт едет на восьмой этаж.	The elevator is going to the eighth floor.	Accusative for destination
Она вышла из первого вагона.	She got out of the first carriage.	Genitive after из
Сегодня пятое марта.	Today is March 5th.	Neuter nominative in a date statement
Концерт состоится пятого марта.	The concert will take place on March 5th.	Genitive date answering “when?”
Откройте книгу на двадцать первой странице.	Open the book to page twenty-one.	Only первой is ordinal and declined
Он финишировал сто вторым.	He finished 102nd.	Instrumental after the idea of finishing in a position
Мы живём в двадцать первом веке.	We live in the twenty-first century.	Prepositional singular
Это произошло в две тысячи двадцатом году.	This happened in 2020.	Compound year; only the last word declines
Пётр Первый правил Россией.	Peter the First ruled Russia.	Ordinal used with a ruler’s name
Я впервые прочитал эту книгу в десятом классе.	I first read this book in the tenth grade.	Prepositional after в

Common Mistakes

Leaving the ordinal in its dictionary form

• Wrong: Я живу на третий этаже.
• Right: Я живу на третьем этаже.
• Why: A static location with на takes the prepositional case. The ordinal must agree with этаже.

Ignoring gender

• Wrong: первый страница
• Right: первая страница
• Why: Страница is feminine, so the ordinal needs the feminine ending -ая.

Making every part of a compound number ordinal

• Wrong: двадцатый первый этаж
• Right: двадцать первый этаж
• Why: In a compound ordinal, only the final component is ordinal. The preceding component stays cardinal.

Using the nominative day when answering “when?”

• Wrong: Встреча будет пятое марта.
• Right: Встреча будет пятого марта.
• Why: A date used adverbially to say when an event occurs normally takes the genitive. Сегодня пятое марта is different because it identifies today’s date.

Copying English floor labels without checking the system

• Potentially misleading: второй этаж for British “first floor”
• Often right: второй этаж for the storey one level above street level
• Why: Russian calls the street-level storey первый этаж. Translate the physical level, not merely the English label.

Forgetting animacy in the masculine accusative

• Wrong: Я поздравил первый участник.
• Right: Я поздравил первого участника.
• Why: An animate masculine direct object uses the genitive-like accusative form.

Usage Notes

Ordinals often appear after the noun in labels, routes, chapters, and numbered items: глава первая (Chapter One), пункт третий (Item Three). This order sounds like a heading or formal enumeration. In ordinary descriptive phrases, the ordinal usually comes first: первая глава, третий пункт.

Digits are common in writing, but readers still supply the required spoken ending. Russian sometimes adds a hyphenated ending to Arabic numerals, especially in compact or technical writing: 21-й этаж, на 21-м этаже, к 5-й странице. The ending reflects the grammatical form. In dates, however, the normal notation is simply 5 марта, without a hyphenated ordinal ending.

Names of rulers use the ordinal after the name: Пётр Первый, Екатерина Вторая. Roman numerals are usual in print—Пётр I, Екатерина II—but they are read as agreeing ordinals.

Beyond the Basics / Advanced Use

Ordinal forms can become part of fixed expressions. В первую очередь literally contains “in the first order” but means “first of all” or “as a priority.” Из первых рук means “first-hand,” and вторые руки can refer to second-hand ownership. Learn these as phrases because their English equivalents may not preserve the same number or case.

Russian distinguishes an ordinal from an adverb that says how many times something happens. Второй раз means “the second time,” while дважды means “twice.” Similarly, впервые means “for the first time,” not simply “first” as an adjective:

• Я читаю эту книгу второй раз. — I am reading this book for the second time.
• Я впервые читаю эту книгу по-русски. — I am reading this book in Russian for the first time.

Complex ordinal stems for exact hundreds and thousands can look unusual: двухсотый, трёхсотый, пятитысячный. In very large compounds, however, the central agreement principle still helps: the ordinal element at the end carries the endings required by the noun and sentence.

Practice Tips

1. Build four-form sets with real nouns: первый поезд, первая встреча, первое письмо, первые дни. Then repeat with второй, третий, and пятый.
2. Take five dates from your calendar. Say each first as an identification—Сегодня десятое июля—and then as an event date—Встреча будет десятого июля.
3. Describe a building or table of contents aloud. Practice the three-way floor contrast: на третий этаж (to), на третьем этаже (on), с третьего этажа (from).

Related Concepts

• Prerequisite: Numbers 1–20 — provides the basic cardinal numbers from which many ordinals are built.