San Carlo ai Catinari, also called Santi Biagio e Carlo ai Catinari, is an early-Baroque style church in Rome, Italy. It is located on Piazza Benedetto Cairoli, 117 just off the corner of Via Arenula and Via dei Falegnami, a few blocks south of the church of Sant'Andrea della Valle.

There are more than 900 churches in Rome, which makes it the city with the largest number of churches in the world. Almost all of these are Catholic.