Total Assets
$6.9B
Total Deposits
$5.5B
Branches
59
Established
1887
Old Second National Bank is a bank headquartered in Aurora, Illinois, established in 1887. It holds $6.9B in total assets across 59 branch locations. In our editorial opinion, based on public FDIC/NCUA data, Old Second National Bank earns a TFS Financial Health Grade of A- (87.4/100) — our editorial assessment, not an official rating or financial advice.
TFS Health Grade
87.4 / 100
Excellent financial health
How we gradeTFS Health Grades are our editorial opinion based on public FDIC/NCUA data — not an official rating, not financial advice.
Watching Old Second National Bank?
Get a free alert the moment its TFS financial-health grade changes. No spam, ever.
Financial data through June 30, 2026. Updated by TFS August 28, 2026. Data sourced from FDIC BankFind Suite as of 2026-Q2. This data is provided by the federal government and is believed to be accurate, but TheFinanceSection.com cannot guarantee its completeness or timeliness.
Data sourced from CFPB Consumer Complaint Database. This data is provided by the federal government and is believed to be accurate, but TheFinanceSection.com cannot guarantee its completeness or timeliness.
| Branch | Address | City | State | Type |
|---|---|---|---|---|
| Old Second National BankHQ | 37 S River St | Aurora | IL | 11 |
| Old Second National Bank | 1230 N Orchard Rd | Aurora | IL | 11 |
| Old Second National Bank | 335 N Eola Rd | Aurora | IL | 11 |
| Old Second National Bank | 2000 W Galena Blvd | Aurora | IL | 11 |
| Old Second National Bank | 1350 N Farnsworth Ave | Aurora | IL | 11 |
| Old Second National Bank | 1061 W Stearns Rd | Bartlett | IL | 11 |
| Old Second National Bank | 1991 W Wilson St | Batavia | IL | 11 |
| Old Second National Bank | 2 S York Rd | Bensenville | IL | 11 |
| Old Second National Bank | 355 W Army Trail Rd | Bloomingdale | IL | 11 |
| Old Second National Bank | 672 E Boughton Rd | Bolingbrook | IL | 11 |
| Old Second National Bank | 1104 W Boughton Rd | Bolingbrook | IL | 11 |
| Old Second National Bank | 194 S Main St | Burlington | IL | 11 |
| Old Second National Bank | 401 N Gary Ave | Carol Stream | IL | 11 |
| Old Second National Bank | 1380 W Army Trail Rd | Carol Stream | IL | 11 |
| Old Second National Bank | 1301 W Taylor St | Chicago | IL | 11 |
| Old Second National Bank | 9443 S Ashland Ave | Chicago | IL | 11 |
| Old Second National Bank | 13323 S Baltimore Ave | Chicago | IL | 11 |
| Old Second National Bank | 6400 W North Ave | Chicago | IL | 11 |
| Old Second National Bank | 333 W Wacker Dr | Chicago | IL | 12 |
| Old Second National Bank | 195 W Joe Orr Rd | Chicago Heights | IL | 11 |
| Old Second National Bank | 8001 Cass Ave | Darien | IL | 11 |
| Old Second National Bank | 8301 Cass Ave | Darien | IL | 11 |
| Old Second National Bank | 3010 Highland Pkwy | Downers Grove | IL | 21 |
| Old Second National Bank | 2800 Finley Rd | Downers Grove | IL | 11 |
| Old Second National Bank | 749 N Main St | Elburn | IL | 11 |
| Old Second National Bank | 3290 Us Highway 20 And Nesler Road | Elgin | IL | 11 |
| Old Second National Bank | 3842 W 95th St | Evergreen Park | IL | 11 |
| Old Second National Bank | 3301 Vollmer Rd | Flossmoor | IL | 11 |
| Old Second National Bank | 20201 S La Grange Rd | Frankfort | IL | 11 |
| Old Second National Bank | 1657 Bloomingdale Rd | Glendale Heights | IL | 11 |
| Old Second National Bank | 1 Grant Sq | Hinsdale | IL | 11 |
| Old Second National Bank | 850 Essington Rd | Joliet | IL | 11 |
| Old Second National Bank | 701 Westmore Meyers Rd | Lombard | IL | 21 |
| Old Second National Bank | 1122 S Main St | Lombard | IL | 11 |
| Old Second National Bank | 711 S Meyers Rd | Lombard | IL | 11 |
| Old Second National Bank | 707 N Main St | Lombard | IL | 11 |
| Old Second National Bank | 717 S Meyers Rd | Lombard | IL | 21 |
| Old Second National Bank | 100 S Main St | Lombard | IL | 23 |
| Old Second National Bank | 1830 Douglas Rd | Montgaomery | IL | 11 |
| Old Second National Bank | 2020 Feldott Ln | Naperville | IL | 11 |
| Old Second National Bank | 200 John St | North Aurora | IL | 11 |
| Old Second National Bank | 1515 W 22nd St Ste 100w | Oak Brook | IL | 11 |
| Old Second National Bank | 17w754 22nd St | Oak Brook Terrace | IL | 11 |
| Old Second National Bank | 1200 Douglas Rd | Oswego | IL | 11 |
| Old Second National Bank | 323 E Norris Dr | Ottawa | IL | 11 |
| Old Second National Bank | 7101 W 127th St | Palos Heights | IL | 11 |
| Old Second National Bank | 7050 Burroughs Ave | Plano | IL | 11 |
| Old Second National Bank | 505 N Weber Rd | Romeoville | IL | 11 |
| Old Second National Bank | 1870 Stearns Rd | South Elgin | IL | 11 |
| Old Second National Bank | 601 E 162nd St | South Holland | IL | 11 |
Showing 50 of 59 branches
Data sourced from FDIC BankFind Suite. This data is provided by the federal government and is believed to be accurate, but TheFinanceSection.com cannot guarantee its completeness or timeliness.
Data sourced from FDIC Enforcement Decisions and Orders / NCUA. This data is provided by the federal government and is believed to be accurate, but TheFinanceSection.com cannot guarantee its completeness or timeliness.
TFS Financial Health Grades represent our editorial assessment based on publicly available data and our proprietary methodology. They do not represent financial advice or an official government rating. Data on this page is sourced from federal government databases and is believed to be accurate.
Benchmarked against 60 active, federally insured banks reporting in the same quarter and holding roughly 0.5×–2× its assets. Same-state and overlapping-market peers are prioritized.
TFS health score
87.4
Tier 1 capital ratio
12.05%
Return on assets
1.69%
Non-performing loans
1.08%
Efficiency ratio
49.49%
Asset growth (YoY)
20.39%
Suggested direct comparisons
Aurora, IL
$2.0M
Effingham, IL
$6.7B
Complaint percentiles are intentionally withheld while TFS audits CFPB company matching and import coverage. Peer conclusions use complete same-quarter regulatory metrics only.