Which level of courts would be MOST likely to hear the MOST criminal cases that are decided only by a judge?

District court

Explanation:

Compared to other courts, District court is regarded to be in the lower hierarchy. But, it handle criminal cases in united states beside manslaughter, treason, and murder

It is usually where small criminal offenses got handled. (such as simple assault during bar fight, Or threatening trespassing). Most of the people who went to district court did not have a strong enough case to bring their case to trial, so usually it's decided only by a judge.

Magistrate