Senex is a Latin word literally meaning a man of old age.

Senex may also refer to:

Wise old man, a Jungian archetype also referred to as the senex The senex amans, in stage comedy, an old man unsuitably in love with a much younger woman The senex iratus, in stage comedy, an old man who irrationally opposes the love of the young couple John Senex (1678-1740), English cartographer Senex, a poem by Sir John Betjeman describing an older man's guilty, but harmless, pleasure in watching young women playing sports Senex, a character in the novel A Wind in the Door, a subcellular creature "Senex" (Alan Lascelles), the pseudonymous author of the Lascelles Principles (1950) Senex Energy, an Australian company

See also Cenex (disambiguation) Old man (disambiguation) Elder (disambiguation)