We will be CLOSED on Monday, May 27th in observance of Memorial Day. We will reopen on Tuesday, May 28th for normal business.

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Our History

NorthStar Credit

NorthStar Credit Union Merged with NuMark Credit Union in 2021 to provide comprehensive services to the community. The NorthStar mission was to be the clear choice for financial services of those who live or work in the communities they served; they accomplished this by offering products tailored to the individual needs of their members. That same spirit continues on in NuMark as we put our members first in all we do.

Standard oil


In 1971, Employees of Amoco in Naperville, Illinois came together to cooperatively afford employees an opportunity to achieve their financial goals by founding Standard Oil Research Federal Credit Union.

BP Naperville 2

1987 - Building a Name

The Credit Union expanded its select employer groups. While maintaining its presence on the Amoco, now BP, site, a new headquarters was established in the “N” building in Naperville. The credit union changed its name to NaperTech Federal Credit Union.

NSCU 8211 Logo 2013

1997 - Community Outreach

NaperTech changed names to NorthStar Credit Union to better reflect the Credit Union’s core values and mission. In 2001, NorthStar moved its headquarters to Warrenville, and obtained a community charter to increase its membership reach.


2012 - Merging to Accomplish More

Southwest Chicago Chapter Credit Union merged with NorthStar, which expanded its offerings to consumers living, working, or worshiping in the Bridgeport community on the Southside of Chicago.


2016 - Upward Growth

NorthStar merged with Oak Trust Credit Union, gaining two additional branches in Plainfield and Aurora.

Ann and Lloyd FINAL

2021 - Stronger Together

In 2021, NorthStar Credit Union merged with NuMark Credit Union bringing the four NorthStar branches, Aurora, Bridgeport, Plainfield, and Warrenville to the NuMark Family. We stand ready to provide exceptional service to our members.

Find a Location


403 Asbury Drive
Aurora IL 60502

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555 W. 31st Street
Chicago IL 60616

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9809 W. 55th Street
Countryside IL 60525

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Crest Hill

2380 Caton Farm Road
Crest Hill IL 60403

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137 N Main St
P.O. Box 547
Earlville IL 60518

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Mail to: PO Box 2729 Joliet, IL 60434
1654 Terry Drive
Joliet IL 60436

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New Lenox

951 E. Lincoln Highway
New Lenox IL 60451

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Paw Paw

235 Chicago Rd.
P.O. Box 7
Paw Paw IL 61353

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12251 S. Route 59
Plainfield IL 60585

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303 S. Pennsylvania Ave.
P.O. Box 20
Sublette IL 61367

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Tinley Park

8001 W. 159th Street
Tinley Park IL 60477

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3S555 Winfield Road
Warrenville IL 60555

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Woodhaven (Gated Community)

3 E. Woodhaven Drive
P.O. Box 20
Sublette IL 61367

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