A. montanus may refer to:
- Acanthus montanus, or mountain thistle
- Adaina montanus, a moth
- Aenetus montanus, a moth
- Agapetus montanus, a caddisfly
- Alsodes montanus, a frog
- Anthodiscus montanus, a plant of the family Caryocaraceae
- Araeococcus montanus, a synonym of Pseudaraeococcus montanus, a plant of the family Bromeliaceae
- Astylosternus montanus, a frog
See also
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