The routing number for Peoples United Bank can vary depending on the state in which you opened your account. Generally, routing numbers are used to identify the financial institution in various transactions such as direct deposits and electronic payments. For Peoples United Bank, the routing numbers typically range, with some common examples being 011100037 for accounts opened in Connecticut and 021301174 for accounts in Vermont. However, it is important for customers to verify their specific routing number as it may differ based on the account type and state. For the most accurate and up-to-date information, it is advisable to visit the official Peoples United Bank website, where you can find the routing number that corresponds to your account.