Tesseract
- A barbershop quartet from the University of Illinois at Urbana-Champaign and the 2005 Illinois District Collegiate Champions.
- http://www.tesseractquartet.com/

Take 2 Barbershop Quartet Chicago
- A Barbershop Quartet located in the Chicagoland area. That performs songs in the barbershop and other a cappella styles.
- http://www.take2quartet.com

TakeCharge Quartet
- A barbershop quartet based in Cedar Falls and Waverly, Iowa, with a wide variety of a cappella songs and shows. Two members from the Cedar Rapids area attending UNI and two ol'working guys.
- http://www.harmonize.com/takecharge/

Top Drawer Four
- A quartet from Hanover, New Hampshire that has been singing together since 1982.
- http://www.nedistrict.org/quartets/TopDrawerFour/

Trademark
- Quartet from Hilltop, Minnesota who are also members the Great Northern Union and the 1999 LOL District Quartet Champions.
- http://arneberg.com/bbshop/trademark/

TopCats Barbershop Quartet
- Sacramento area quartet, providing good music with good fun.
- http://www.topcats.net