Papa can refer to:

• The letter P in the NATO phonetic alphabet.
• Name of mother Earth according to Polynesian mythology. See Papa (mythology).
• A Korean drama. See Papa (drama).
• In Hinduism, bad merits that occur due to bad deeds.
• The town of Pápa in Hungary.
• An English slang word for father.
• The word "father" or a variation of it, in many languages (see below).
• The Spanish word for potato (in some dialects) and slang for "food".
• (in uppercase and with the definite article) the Spanish and Italian word for Pope. Also used occasionally by some Catholics regardless of language.

A lot of languages (often unrelated) have words with labial consonants and open vowels as their word for "father" and "mother"; /papa/ is just one example. A discussion of this phenomenon can be found in the article Mama and papa.