California Bancorp (CALB) 8-K Changes in Registrant's Certifying Accountant

Exhibit 16.1

April 4, 2023

Office of the Chief Accountant

Securities and Exchange Commission

100 F Street, N. E.

Washington, D.C. 20549

Ladies and Gentlemen:

We have read California BanCorp’s statements included under Item 4.01 of its Form 8-K to be filed on or about April 4, 2023, and we agree with such statements, except that we are not in a position to agree or disagree with the Company’s statements made in the 1^st, 2^nd,, and 5^th paragraphs, except that we agree with the statement that Crowe LLP was included in the review process discussed in the 1^st paragraph.

Crowe LLP

Sacramento, California

cc: Mr. Ed Traille

Audit Committee Chairman

California Bancorp