Siu Credit Union Carbondale, Illinois
Siu Credit Union is a state-chartered credit union headquartered in Carbondale, IL, established in 1938 (NCUA charter 60279), and it is regulated and insured by the NCUA. At Q2 2026 it reported 46,485 members and total assets of $591.3M (up 9.1% from Q2 2025), the 21st largest of 185 credit unions headquartered in Illinois. Its net worth ratio was 11.56% at Q2 2026, in the well capitalized band.
Also written as Siu CU
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Data as of · sourced from NCUA 5300 call reports. How we update
- Charter
- State-chartered credit union
- Regulator
- NCUA
- Deposit insurance
- NCUA (NCUSIF)
- NCUA charter number
- 60279
- Headquarters
- Carbondale, IL
- Established
- 1938
- Total assets, Q2 2026
- $591.3M
- Assets vs Q2 2025
- +9.1%
- Members, Q2 2026
- 46,485
- Net worth ratio, Q2 2026
- 11.56%
- Latest call report
- Q2 2026, NCUA 5300 · Siu Credit Union call report
- Asset rank in state
- 21st of 185 in Illinois
- Routing number
- 281276420
- Branches
- 7
It has 1,665 more members than on June 30, 2025 (+3.7%). Its net worth ratio was up 0.14 percentage points from 11.42% on June 30, 2025. Used vehicle loans are its largest loan category, $193.4M of $391.4M in total loans on its June 30, 2026 filing. Its 60-day delinquency ratio of 0.90% is above the 0.68% median of the 1,338 credit unions with $100M to $1B in assets for Q2 2026. Its 11.56% net worth ratio is above that band's 11.43% median.
Credit unions merged into Siu Credit Union
Menard Credit Union (2016) · D-B Employees Credit Union (2015) · N.Y.C. Employees Credit Union (2015) · Marion Memorial Hospital Credit Union (2014)
Frequently asked about Siu Credit Union
How big is Siu Credit Union?
At Q2 2026 it reported total assets of $591.3M and 46,485 members.
Where is Siu Credit Union headquartered?
It is headquartered in Carbondale, IL, United States.
When was Siu Credit Union founded?
It was established in 1938, per NCUA records.
Is Siu Credit Union FDIC insured?
No. The FDIC insures banks, not credit unions. It is a federally insured credit union (NCUA charter 60279): member shares are insured by the National Credit Union Share Insurance Fund, run by the NCUA, up to $250,000 per member, per insured credit union, for each account ownership category, the same limit the FDIC applies to bank deposits.
Who regulates Siu Credit Union?
It is a state-chartered credit union, supervised by its state credit union regulator and by the NCUA, which insures its shares.
Is Siu Credit Union well capitalized?
Its net worth ratio was 11.56% at Q2 2026, in the well capitalized band. NCUA considers a credit union well capitalized at a net worth ratio of 7% or higher.
What is Siu Credit Union's delinquency ratio?
Its delinquency ratio was 0.90% at Q2 2026: loans 60 or more days past due as a share of total loans.
What is Siu Credit Union's loan-to-share ratio?
Its loan-to-share ratio was 75.34% at Q2 2026: total loans as a share of member shares and deposits.
Credit Union Profile
- Headquarters
- Carbondale, IL 62902
- Charter Type
- State-chartered credit union
- Primary Regulator
- NCUA
- Insurance
- NCUSIF
- Established
- 1938
- NCUA Charter #
- 60279
- RSSD ID
- 635091
- Members
- 46,485
- Potential members
- 510,623
Size & Membership
Profitability
Q2 annualizedCapital & Asset Quality
Peer comparison: credit unions of similar size
It ranks against 1,341 credit unions with $100M to $1B in assets, as of Q2 2026. It is in the top quartile on 1 of 7 ranked measures.
| Metric | This credit union | Peer median | Rank among peers |
|---|---|---|---|
| Net worth ratio Middle half of peers: 9.81% to 13.58% | 11.56% | 11.43% | 52nd above |
| Return on assets Middle half of peers: 0.43% to 1.23% | 1.04% | 0.81% | 64th above |
| Return on equity Middle half of peers: 3.87% to 9.84% | 8.98% | 7.02% | 67th above |
| Net interest margin Middle half of peers: 3.30% to 4.10% | 3.66% | 3.70% | 47th below |
| Efficiency ratio Middle half of peers: 68.90% to 83.49% | 68.86% | 76.55% | 75th top |
| Cost of funds Middle half of peers: 0.92% to 1.56% | 1.43% | 1.24% | 35th below |
| Delinquency ratio Middle half of peers: 0.39% to 1.12% | 0.90% | 0.68% | 38th below |
| Yield on assets Middle half of peers: 4.53% to 5.37% | 5.09% | 4.92% | 59th position only |
| Loan-to-share ratio Middle half of peers: 62.05% to 86.41% | 75.34% | 75.66% | 49th position only |
Quarterly trends
Last 6 quarters of 5300 filings. Under each chart, Q2 2026 against Q2 2025. How these charts are built
$591.3M total assets against $542.0M; $519.4M total shares and deposits against $477.1M; $391.4M total loans against $364.3M.
$68.3M net worth against $61.9M.
11.56% net worth ratio against 11.42%.
75.34% loan-to-share ratio against 76.37%.
0.90% delinquency ratio against 0.43%.
1.04% return on assets against 1.02%; 8.98% return on equity against 8.94%.
3.66% net interest margin against 3.64%.
46,485 members against 44,820.
Quarterly trend: last 6 quarters
| Quarter | Net worth ratio | ROA | Delinquency | Loan-to-share |
|---|---|---|---|---|
| June 30, 2026 | 11.56% | 1.04% | 0.90% | 75.34% |
| March 31, 2026 | 11.36% | 1.30% | 0.88% | 75.07% |
| December 31, 2025 | 11.57% | 1.46% | 0.84% | 78.81% |
| September 30, 2025 | 11.58% | 0.99% | 0.68% | 80.86% |
| June 30, 2025 | 11.42% | 1.02% | 0.43% | 76.37% |
| March 31, 2025 | 11.47% | 0.90% | 0.38% | 73.79% |
Scroll sideways to see every column.
How we read these figures
Glossary: net worth ratio, delinquency, ROA, loan-to-share. The net worth category is ours, from NCUA's 7% well and 6% adequately capitalized cutoffs. It is not NCUA's determination, which can differ. ROA, ROE and margin annualize the quarter; NCUA's Financial Performance Report annualizes the year to date (YTD). Peer rank interpolates size-band percentiles. Methodology.