Bank BranchesEvery insured bank office · FDIC · 1994–2026

Bank Branches › Illinois › DuPage County › 8001 Cass Ave

Full-service office · FDIC office no. 14598

Old Second National Bank
8001 Cass Ave, Darien, IL 60561

Open · June 2026

$247M
deposits, 2026
1973
established
56th
of 250 in county
3
names on the sign
This office's passbook1994–2026
DateBank on the signDepositsChange
Jun 30 2026Old Second National Bank$247M+1%
Jun 30 2025Old Second National Bank$245M−4%
Jun 30 2024Old Second National Bank$257M−14%
Jun 30 2023Old Second National Bank$300M−22%
Jun 30 2022Old Second National BankNEW NAME$383M+17%
Jun 30 2021West Suburban Bank$328M+10%
Jun 30 2020West Suburban Bank$298M+11%
Jun 30 2019West Suburban Bank$269M−1%
Jun 30 2018West Suburban Bank$272M−7%
Jun 30 2017West Suburban Bank$294M+4%
Jun 30 2016West Suburban Bank$282M+2%
Jun 30 2015West Suburban Bank$275M−1%
Jun 30 2014West Suburban Bank$278M+4%
Jun 30 2013West Suburban Bank$268M+6%
Jun 30 2012West Suburban Bank$252M+4%
Jun 30 2011West Suburban Bank$244M+1%
Jun 30 2010West Suburban Bank$241M+9%
Jun 30 2009West Suburban Bank$220M+4%
Jun 30 2008West Suburban Bank$212M+1%
Jun 30 2007West Suburban Bank$210M−6%
Jun 30 2006West Suburban Bank$223M−1%
Jun 30 2005West Suburban Bank$226M−2%
Jun 30 2004West Suburban Bank$229M+3%
Jun 30 2003West Suburban Bank$223M+5%
Jun 30 2002West Suburban Bank$213M+5%
Jun 30 2001West Suburban Bank$203M+4%
Jun 30 2000West Suburban Bank$196M−1%
Jun 30 1999West Suburban Bank$198M0%
Jun 30 1998West Suburban Bank$197M−7%
Jun 30 1997West Suburban BankNEW NAME$212M+16%
Jun 30 1996West Suburban Bank of Darien$182M+2%
Jun 30 1995West Suburban Bank of Darien$179M+19%
Jun 30 1994West Suburban Bank of Darien$151M
1973-06-18Office established (FDIC record) — 21 years before this passbook begins

Nearest other open offices in DuPage County

  1. 0.6 miJPMorgan Chase Bank, National Association · 7501 Cass Ave, Darien
  2. 0.8 miThe Huntington National Bank · 7335 Cass Ave, Darien
  3. 0.9 miRepublic Bank of Chicago · 1510 75th St, Darien
  4. 1.3 miFirst American Bank · 2013 75th St, Darien
  5. 1.5 miCitibank, National Association · 2225 75th St, Darien
  6. 1.6 miBMO Bank National Association · 2275 75th St, Darien
  7. 1.7 miHinsdale Bank & Trust Company, National Association · 7380 Route 83, Darien
  8. 1.7 miFifth Third Bank, National Association · 2401 75th St, Darien

All banks in DuPage County →
Every Old Second National Bank office →
Earlier names and banks folded into Old Second National Bank →

Names on the sign

1994–1996West Suburban Bank of Darien1997–2021West Suburban Bank2022–nowOld Second National Bank

The FDIC office number stays with the building when banks merge or rename, so the same office appears under each owner. Follow an earlier name to see what became of that bank.

Deposits are the balances the bank assigned to this office on June 30 of each year, in nominal dollars. Source: FDIC Summary of Deposits, office (UNINUMBR) 14598.