To Whom It May Concern: I wanted to know if one needs a minyan to recite Birchat HaChodesh? Thank you!

Shalom, The Mishna Brura (417,1) explains that the idea of benching Rosh Chodesh on the previous Shabbat is to remind us to observe it. Therefore, there is no need for a minyan and one can do it alone. With Love of Israel, Rav Ari Shvat