Our three overall top choices for banking in Cambodia: ABA Bank, Hong Leong Bank (Cambodia), and Maybank (Cambodia), with ABA sweeping #1 in all four (4) categories.
Personal Banking: #1 ABA Bank
Business Banking: #1 ABA Bank
Domestic (Transactional) Banking: #1 ABA Bank
Offshore* Wealth Management: #1 ABA Bank
*Useability for a non-resident holder of an ABA account (non-resident of Cambodia).
All banking in Cambodia is governed by the National Bank of Cambodia (NBC): https://www.nbc.org.kh/english/supervision/commercial_banks.php