CA2
# CA2

CA2, CA-2 or CA II may refer to :

* Carbonic anhydrase II, a human gene
* the United States Court of Appeals for the Second Circuit
* California's 2nd congressional district
* Hummel CA-2, an ultralight aircraft
* California State Route 2
* Ca II, a singly-ionized calcium that produces the H and K lines, and the calcium triplet lines in the spectrum of many stars
* Cornu Ammonis 2, a region of the hippocampus
