An apostrophe and a single quotation mark can look exactly the same because the same Unicode character may perform both roles.
A straight keyboard mark such as ‘ can act as either an apostrophe or a single quote in plain text. In typeset English, an apostrophe commonly appears as ’, which is also the character normally used as a closing single quotation mark.
The question “Is this an apostrophe or a single quote?” therefore has two parts: which character is encoded, and what function is that character performing in the text?
Apostrophe and Single Quote Characters at a Glance
| Symbol | Unicode name | Code point | Typical role |
|---|---|---|---|
| ‘ | APOSTROPHE | U+0027 | Straight apostrophe or single quotation mark in plain text |
| ‘ | LEFT SINGLE QUOTATION MARK | U+2018 | Opening single quotation mark in common English typography |
| ’ | RIGHT SINGLE QUOTATION MARK | U+2019 | Closing single quotation mark and preferred punctuation apostrophe in typeset text |
| ʼ | MODIFIER LETTER APOSTROPHE | U+02BC | Letter or modifier character in particular orthographies and transliteration systems |
What Is the Straight Apostrophe ‘?
‘ is U+0027 APOSTROPHE.
It is inherited from ASCII and is available directly on most keyboards.
It is commonly used in contractions:
don’t
it’s
and possession:
Alex’s book
It is also widely used as a straight single quotation mark:
‘quoted text’
U+0027 is therefore an overloaded character. Its role usually has to be understood from context.
What Are Curly Single Quotation Marks?
Common English typography distinguishes an opening single quotation mark from a closing one.
The opening mark is:
‘ — U+2018 LEFT SINGLE QUOTATION MARK
The closing mark is:
’ — U+2019 RIGHT SINGLE QUOTATION MARK
For example:
She described it as ‘a surprising result’ before continuing.
These characters are part of the broader system of punctuation symbols, where visual appearance and grammatical function do not always map to a unique character.
Which Character Should Be Used as a Typographic Apostrophe?
For a punctuation apostrophe in typeset text, Unicode prefers ’, U+2019 RIGHT SINGLE QUOTATION MARK.
Examples include:
don’t
we’re
Sarah’s
This means U+2019 can have at least two familiar punctuation roles:
- closing a single quotation;
- acting as an apostrophe inside or beside a word.
The surrounding text determines which function it is performing.
Why Is ’ Both a Quote and an Apostrophe?
The important fact is not that there are two separate characters with the same shape. In common typeset English, the same U+2019 character is used for both roles.
Compare:
‘hello’
and:
don’t
The final quotation mark after hello and the apostrophe in don’t are both U+2019.
The character is the same; the punctuation function is different.
Straight Apostrophe ‘ vs Curly Apostrophe ’
The straight and curly forms should not be understood as simply two fonts for the same character.
| Symbol | Code point | Identity |
|---|---|---|
| ‘ | U+0027 | APOSTROPHE |
| ’ | U+2019 | RIGHT SINGLE QUOTATION MARK |
Changing the font of U+0027 does not turn it into U+2019. They remain distinct encoded characters.
Why Do Word Processors Change ‘ Into ’?
Many writing applications provide automatic quotation-mark conversion, often called “smart quotes.”
The application examines surrounding text and may replace U+0027 with an appropriate typographic character.
For example:
don’t
may become:
don’t
And:
‘hello’
may become:
‘hello’
This is an actual character substitution, not merely a change in font styling.
Why Smart Quotes Can Choose the Wrong Direction
Automatic conversion has to infer punctuation from context, so unusual constructions can produce mistakes.
A common example is an abbreviated year:
’90s
The mark represents omitted digits and functions as an apostrophe. It is not an opening quotation mark merely because it appears at the beginning of the shortened expression.
This is one reason typographic punctuation should be checked rather than assuming every automatic conversion is correct.
Apostrophe vs Opening Single Quote
In ordinary English punctuation, a curly apostrophe normally has the same orientation as the closing single quotation mark:
’
not the opening mark:
‘
Compare:
‘word’
with:
word’s
The apostrophe in word’s is the same character as the mark closing ‘word’.
What Is the Modifier Letter Apostrophe ʼ?
ʼ is U+02BC MODIFIER LETTER APOSTROPHE.
It may resemble U+2019 very closely, but its function is different. Unicode recommends U+02BC where an apostrophe-like mark functions as a modifier letter, such as in certain transliteration systems or orthographies.
It can be used for sounds or letter functions including glottalization or a glottal stop in particular writing systems.
Compare:
| Symbol | Unicode | General role |
|---|---|---|
| ’ | U+2019 | Punctuation apostrophe / right single quote |
| ʼ | U+02BC | Modifier letter apostrophe |
Because the glyphs can be nearly identical, context and code point are more reliable than appearance.
Do All Languages Use Quotation Marks the Same Way?
No. Quotation conventions vary considerably between languages and typographic traditions.
The Unicode names LEFT SINGLE QUOTATION MARK and RIGHT SINGLE QUOTATION MARK identify the characters, but do not prescribe one universal opening-and-closing convention for every language.
Some languages use angle quotation marks, low quotation marks, reversed orientations, or other systems.
Apostrophe vs Prime ′
The prime symbol ′ is another character commonly approximated with an apostrophe.
| Symbol | Name | Typical use |
|---|---|---|
| ‘ | Apostrophe | Plain-text punctuation and quotation |
| ’ | Right single quotation mark | Typographic apostrophe or closing single quotation |
| ′ | Prime | Mathematics, arcminutes, feet, and related notation |
For example, six feet can be typeset as:
6′
A keyboard apostrophe is often substituted:
6′
but the underlying characters are not identical.
Apostrophe vs Backtick `
The backtick ` is U+0060 GRAVE ACCENT and is also different from an apostrophe.
In some fonts, ` and ‘ look like opposing diagonal strokes.
The backtick is frequently used in programming, command-line environments, and markup languages. It should not be mistaken for U+2018 LEFT SINGLE QUOTATION MARK.
Why This Difference Matters in Code
Programming languages frequently require exact punctuation characters.
A language may require the ASCII apostrophe U+0027 to delimit a string or character literal. Replacing it with U+2019 can make the source invalid.
These two pieces of text may look similar:
‘hello’
’hello’
but they do not contain the same character sequence.
Automatic smart-quote conversion is therefore useful in prose and potentially destructive in source code.
Why This Difference Matters in Search and Data
Software does not necessarily treat ‘, ’, and ʼ as equivalent.
The distinction can affect:
- search results;
- name matching;
- database records;
- filenames;
- URLs;
- source code;
- text comparison.
A human reader may see two strings as identical while software sees different sequences of Unicode characters.
How to Tell Which Apostrophe-Like Character You Have
Appearance can provide a clue, but it is not enough for reliable identification.
| Character | Code point |
|---|---|
| ‘ | U+0027 |
| ` | U+0060 |
| ʼ | U+02BC |
| ‘ | U+2018 |
| ’ | U+2019 |
| ′ | U+2032 |
If you have copied an unfamiliar apostrophe-like mark, the symbol identification tool on What Is This Symbol can help determine which Unicode character is actually present.
The Main Point
“Apostrophe” and “single quote” describe punctuation functions, but those functions can overlap at the character level.
In plain text, U+0027 ‘ often performs both jobs.
In common typeset English:
- ‘ is normally the opening single quotation mark;
- ’ is normally the closing single quotation mark;
- ’ is also the preferred character for a punctuation apostrophe.
U+02BC ʼ adds another important distinction: an apostrophe-shaped character may function as an actual letter or modifier rather than punctuation.
When exact identity matters, determine both what the character is and what it is doing in the surrounding text.