Glagolitic numerals are a numeral system derived from the Glagolitic script, generally agreed to have been created in the 9th century by Saint Cyril. They are similar to Cyrillic numerals, except that numeric values are assigned according to the native alphabetic order of the Glagolitic alphabet. Use of Glagolitic script and numerals declined through the Middle Ages and by the 17th century Glagolitic was used almost only in religious writings. It is unclear if the use of Glagolitic numerals persisted as long as the use of Glagolitic script.

The Glagolitic script is the oldest known Slavic alphabet. It is generally agreed that it was created in the 9th century for the purpose of translating liturgical texts into Old Church Slavonic by Saint Cyril, a monk from Thessalonica. He and his brother Saint Methodius were sent by the Byzantine Emperor Michael III in 863 to Great Moravia to spread Christianity there. After the deaths of Cyril and Methodius, their disciples were expelled and they moved to the First Bulgarian Empire instead. The Cyrillic alphabet, which developed gradually in the Preslav Literary School by Greek alphabet scribes who incorporated some Glagolitic letters, gradually replaced Glagolitic in that region. Glagolitic remained in use alongside Latin in the Kingdom of Croatia and alongside Cyrillic until the 14th century in the Second Bulgarian Empire and the Serbian Empire, and later mainly for cryptographic purposes.