Fourteen consonants and ten vowels. Everything else in Korean writing is these letters combined — there is no second set to memorise later, and no characters beyond them.
Hangul Orthography (한글 맞춤법), Article 4Learn Hangul
You can learn to read Korean this week.
Not a claim — an arithmetic fact. Korean writing has 24 letters, and those 24 are built from 8 shapes. Below is where each shape came from, and what to do with it.
The numbers
Five consonant shapes drawn from the mouth, and three vowel marks — heaven, earth, person. Every other letter is one of these with a stroke or a dot added. Learn eight and the rest follow.
Hunminjeongeum Haerye (훈민정음 해례본), 144619 initials × 21 medials × 28 finals. You never learn a syllable as a unit — you assemble it, the way you assemble a word from letters in English.
Unicode Hangul Syllables, U+AC00–U+D7A3Most writing systems drifted into their present shape over centuries. Hangul was designed by King Sejong and his scholars, and the reasoning behind every letter was published in 1446 — so we can read why each shape is what it is.
Hunminjeongeum, promulgated 1446 (created 1443)The Hunminjeongeum Haerye — the book explaining the design — is on the UNESCO Memory of the World Register. UNESCO also names its global literacy award after King Sejong.
UNESCO Memory of the World Register (1997); UNESCO King Sejong Literacy Prize (est. 1989)A letter maps to a sound, and the mapping barely changes. Once you know the 24, you can read a Korean word aloud correctly without knowing what it means — something English spelling does not allow.
Revised Romanization of Korean (국어의 로마자 표기법)A featural alphabet
In most alphabets the shape of a letter tells you nothing about the sound. In Hangul it does twice over: the basic shape tells you where in the mouth the sound is made, and an added stroke tells you it is made harder. Linguists call a writing system with that property featural — Hangul is the one in everyday use.