MCU (Municipal Credit Union) Online Banking Municipal Credit Union (MCU) was founded in 1916 in New York City, where it is still headquartered. It’s a financial service company that makes a way for city employees to have access to low-interest rates Customer Service Telephone 1(212) 693-4900 Online Banking Login How to Log In 1. Go to the MCU homepage at www.nymcu.org. 2. At the left side, click the “Log In” button for returning members. 3. You will be directed to…