Ơ

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

Ơ and Ư were in the past used for Thai Romanization, but are now written as oe and ue.

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

^ "Unicode Character "Ơ" (U+01A0)". Compart. Oak Brook, IL: Compart AG. 2021. Retrieved 2024-02-29.