DeKalb County Credit Union has a special 5.05% APY 12-month certificate. The minimum deposit is $10,000. This is advertised on the credit union's home page.
Membership is open to those who live or work in DeKalb, Cortland, Malta, Milan, Shabbona, or Afton Townships of Illionis. Please see the credit union's membership page for the full details. Membership requires a minimum balance of $5 in the share savings account.
The credit union's office is located in DeKalb, IL. It's federally insured by the NCUA (Charter # 60880). It's a small credit union with $5.4 million in assets and 1,331 members.