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The following tables ofconsonants andvowels (jamo) of theKorean alphabet (Hangul) display (in blue) the basic forms in the first row and their derivatives in the following row(s). They are divided into initials (leading consonants), vowels (middle), and finals tables (trailing consonants).

Thejamo shown below are individuallyromanized according to theRevised Romanization of Hangeul (RR Transliteration), which is a system oftransliteration rules between the Korean andRoman alphabets, originating fromSouth Korea. However, the tables below are not sufficient for normaltranscription of theKorean language as the overarchingRevised Romanization of Korean system takescontextual sound changes into account.

Calledchoseong, or "initials", there are 19 initial consonants, whereof one (ㅇ) is silent, and five (ㄲ, ㄸ, ㅃ, ㅆ, ㅉ) are doubled:

Calledjungseong, or "vowels", there are 21 medial vowels:

Calledjongseong, or "finals", there are 27 final consonants; with the additional case ofno final consonant, there is a total of 28 possibilities:

Severalcollation sequences are used to order words (likealphabetical sorting). The North and South differ on (a) the treatment of composite jamo consonants in syllable-leading (choseong) and -trailing (jongseong) position, and (b) on the treatment of composite jamo vowels in syllable-medial (jungseong) position.

This first sequence is official in South Korea (and is the basic binary order of codepoints in Unicode):

Sequences of this second type are common in North Korea:

With 19 possible initial consonants, 21 possible vowels, and 28 possible final consonants (of which one corresponds to the case of no final consonant), there are a total of 19 × 21 × 28 = 11,172theoretically possible "Korean syllabic blocks",^[1] which are contiguously encoded in the 11,172 Unicode code points from U+AC00 through U+D7A3 in theHangul Syllables Unicode block. However, the majority of these theoretically possible syllabic blocks do not correspond to syllabic blocks found in actual Korean words or proper names.

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