Old National Bank Routing Number: Indiana

Banking since before Indiana had railroads

Old National Bank received its charter in 1834, just 18 years after Indiana became a state. Evansville was then a small Ohio River port town, and the bank's earliest customers were steamboat operators, river merchants, and farmers hauling goods to market along the waterway. Indiana had no railroads yet - the first wouldn't arrive until 1847 - and the Ohio River was the commercial lifeline connecting the state to broader markets in Louisville, Cincinnati, and New Orleans.

Nearly two centuries later, Old National remains headquartered in Evansville, making it one of the longest-continuously-operating banks at its original headquarters in the United States. The routing number 086300012, processed through the Federal Reserve Bank of St. Louis, has served generations of Southern Indiana families and businesses. That kind of institutional continuity is rare in American banking, where mergers, failures, and relocations have erased most banks founded before the Civil War.

The First Midwest deal - from Indiana bank to bistate powerhouse

In February 2022, Old National completed its acquisition of First Midwest Bancorp, a $21 billion-asset bank headquartered in Chicago. The deal was transformative: Old National's asset base nearly doubled to roughly $48 billion, its branch network expanded dramatically into the Chicago metro area and across Illinois, and it gained a significant commercial banking presence in one of the country's largest markets.

For First Midwest customers, the transition meant new account numbers, a new mobile app, and a new routing number. Former First Midwest accounts migrated to Old National's systems over the course of 2022 and 2023. If you were a First Midwest customer, your routing number is now 086300012 - Old National's primary number. Confirm this through the Old National mobile app or at a branch, particularly if you have automated payments tied to your old First Midwest routing number.

Navigating the post-merger routing number transition

Bank mergers create a predictable headache for customers: routing number changes break automatic payments. Direct deposits, mortgage autopay, utility bills, subscription services. Anything linked to your old routing number needs to be updated. Old National provided a transition window during which both the old First Midwest routing numbers and the new Old National number were accepted, but that window has closed.

If you are still experiencing rejected transactions or failed ACH transfers after the merger, the most likely cause is a routing number that was not updated. Contact Old National at 1-800-731-2265 or visit a branch to verify your current routing number and account number. For new account setups, direct deposit, and bill pay, use routing number 086300012.

Community banking philosophy at regional scale

Old National's leadership has consistently described the bank's strategy as "community banking at scale" - maintaining the personal relationships and local decision-making of a small community bank while operating with the resources and product breadth of a regional institution. The First Midwest acquisition tested that philosophy by grafting a Chicago-market bank onto an Evansville-rooted culture. Early indications suggest Old National has largely preserved local management autonomy in its Illinois markets, rather than centralizing everything back to Indiana.

The bank's commercial lending, wealth management, and treasury services now compete in the Chicago market against BMO, Wintrust, and other established players. Whether Old National can maintain its community-first identity while fighting for market share in America's third-largest metro area is the central strategic question facing the institution.

Business banking that grows with you

Old National's strength is deep community relationships in markets where knowing your banker still matters. For businesses scaling beyond a single market - or those that need financial tooling more sophisticated than what a traditional community bank offers - Slash provides the modern layer: automated expense categorization, corporate cards with department-level spend limits, and real-time cash flow dashboards that work across every account and entity. It is business banking infrastructure designed for the pace at which growing companies actually operate.