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O with horn
O with horn
Ơ ơ
O+, O*
Usage
Writing system	Latin script
Type	alphabetic
Language of origin	Vietnamese
Sound values	[ə]
History
Development	O o Ơ ơ;
Sisters	Ờờ, Ớớ, Ởở, Ỡỡ, Ợợ
Variations	O+, O*
Other
Writing direction	Left to Right
	This article contains phonetic transcriptions in the International Phonetic Alphabet (IPA). For an introductory guide on IPA symbols, see Help:IPA. For the distinction between [ ], / / and ⟨ ⟩, see IPA § Brackets and transcription delimiters.

Ơ (lowercase ơ) is one of the 12 Vietnamese language vowels. It represents the sound [ə].^[1]

As with most special Vietnamese letters, this letter is not well-supported by fonts and is often typed as either o+ or o*. The VIQR standard is o+.

On the Windows default Vietnamese keyboard Ơ can be found on where the ] key is on a US English keyboard layout.

Because Vietnamese is a tonal language this letter may optionally have any one of the five tonal symbols above or below it, as in phở.

Character mappings

Character information
Preview	Ơ		ơ		Ờ		ờ
Unicode name	LATIN CAPITAL LETTER O WITH HORN		LATIN SMALL LETTER O WITH HORN		LATIN CAPITAL LETTER O WITH HORN AND GRAVE		LATIN SMALL LETTER O WITH HORN AND GRAVE
Encodings	decimal	hex	dec	hex	dec	hex	dec	hex
Unicode	416	U+01A0	417	U+01A1	7900	U+1EDC	7901	U+1EDD
UTF-8	198 160	C6 A0	198 161	C6 A1	225 187 156	E1 BB 9C	225 187 157	E1 BB 9D
Numeric character reference	Ơ	Ơ	ơ	ơ	Ờ	Ờ	ờ	ờ
VISCII	180	B4	189	BD	150	96	182	B6

Character information
Preview	Ớ		ớ		Ở		ở
Unicode name	LATIN CAPITAL LETTER O WITH HORN AND ACUTE		LATIN SMALL LETTER O WITH HORN AND ACUTE		LATIN CAPITAL LETTER O WITH HORN AND HOOK ABOVE		LATIN SMALL LETTER O WITH HORN AND HOOK ABOVE
Encodings	decimal	hex	dec	hex	dec	hex	dec	hex
Unicode	7898	U+1EDA	7899	U+1EDB	7902	U+1EDE	7903	U+1EDF
UTF-8	225 187 154	E1 BB 9A	225 187 155	E1 BB 9B	225 187 158	E1 BB 9E	225 187 159	E1 BB 9F
Numeric character reference	Ớ	Ớ	ớ	ớ	Ở	Ở	ở	ở
VISCII	149	95	190	BE	151	97	183	B7

Character information
Preview	Ỡ		ỡ		Ợ		ợ
Unicode name	LATIN CAPITAL LETTER O WITH HORN AND TILDE		LATIN SMALL LETTER O WITH HORN AND TILDE		LATIN CAPITAL LETTER O WITH HORN AND DOT BELOW		LATIN SMALL LETTER O WITH HORN AND DOT BELOW
Encodings	decimal	hex	dec	hex	dec	hex	dec	hex
Unicode	7904	U+1EE0	7905	U+1EE1	7906	U+1EE2	7907	U+1EE3
UTF-8	225 187 160	E1 BB A0	225 187 161	E1 BB A1	225 187 162	E1 BB A2	225 187 163	E1 BB A3
Numeric character reference	Ỡ	Ỡ	ỡ	ỡ	Ợ	Ợ	ợ	ợ
VISCII	179	B3	222	DE	148	94	254	FE