Klon, or Kelon, (pronounced: [kəlon]) is a Papuan language of the western tip of Alor Island in the Alor archipelago of East Nusa Tenggara, Indonesia.

Klon is a member of the Alor–Pantar languages, within the Timor–Alor–Pantar language family. Klon is part of the Alor subgroup along with Abui, Adang, Blagar, Kafoa, Kamang, Kui, Retta, Sawila, and Wersing.

Klon is closely related to the Adang language, spoken across Kalabahi Bay to the north.

All the information in this section is from Louise Baird's grammar. Klon has 17 consonant phonemes and 13 vowel phonemes.

Aspiration is sometimes produced with voiceless stops. The voiced labio-velar approximant /w/ is infrequently produced as a voiced bilabial fricative [β] by some speakers.

Some of the consonants have a limited distribution. The voiced velar stop /g/ only occurs syllable initially. The voiced velar nasal /ŋ/ only occurs syllable finally. The voiced palatal stop /ɟ/, which only occurs word-finally, in a limited number of words. Some older speakers use the voiced alveolar stop [d] for /ɟ/. The rhotic trill /r/ and the voiceless alveolar fricative /s/ occur both syllable finally and syllable initially. They occur word initially in only a few lexical items each. Some of these lexical items are clearly borrowings. The voiced labio-velar approximant /w/ and the voiced palatal approximant /j/ do not occur syllable-finally.

The mid-front unrounded vowel /e/ and the open mid back rounded vowel /ɔ/ occur infrequently. Schwa only occurs in unstressed syllables.

Diphthongs occur in both open and closed syllables.