Many people are curious about personal checks and want to know How To Find Bank Routing Number. and checking account numbers. There are three sets of numbers that are important for you to at least know how to identify. The routing number is located in the lower left hand corner of your checks. Today, personal checks have become less popular because of the use of the debit card and the use of online banking. However, people do still enjoy using personal checks to pay bills, to buy things when they are out shopping or for business use.