021000021
View detailsBanking 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 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.
The First Midwest acquisition
In February 2022, Old National completed its acquisition of First Midwest Bancorp, a $21 billion-asset bank headquartered in Chicago. The deal nearly doubled Old National's asset base to roughly $48 billion, expanded its branch network dramatically into the Chicago metro area, and added a significant commercial banking presence in one of the country's largest markets.
Former First Midwest customers migrated to Old National's systems over 2022 and 2023. If you were a First Midwest customer, your routing number is now 086300012. Confirm through the Old National mobile app or at a branch — particularly if you have automated payments tied to your old First Midwest routing number. The transition window during which both routing numbers were accepted has closed. If you're experiencing rejected transactions or failed ACH transfers, an outdated routing number is the most likely cause. Contact Old National at 1-800-731-2265 to verify.
Routing number and transfers
086300012 applies to all new account setups, direct deposit, bill pay, and ACH transfers across Old National's full footprint — Indiana, Illinois, and beyond. Find it in the Old National mobile app, online banking under account details, or the bottom-left corner of a check.
Community banking at regional scale
Old National's leadership has consistently described the strategy as "community banking at scale" — personal relationships and local decision-making with the resources of a regional institution. The First Midwest acquisition tested that by grafting a Chicago-market bank onto an Evansville-rooted culture. Early indications suggest Old National has preserved local management autonomy in its Illinois markets rather than centralizing everything back to Indiana. The bank now competes in Chicago against BMO, Wintrust, and other established players — whether it can maintain its community-first identity while fighting for share in America's third-largest metro area is the central 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 more sophisticated financial tooling than 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.
