Welcome to Chief Okemos Sportsman’s Club!

COSC is a family-friendly gun and archery club in Dimondale, Michigan, located about 15 minutes west of Lansing.


To promote the safe and responsible use of firearms and archery activities in the Mid-Michigan area

C.O.S.C. Pledge

I give my pledge as an American to save and faithfully defend from waste the natural resources of my country, its air, soil, and materials, its forests, waters and wildlife.

Join or Renew your COSC Membership

Club Hours:  9:00 am to 1/2 hour before sunset, but not past 9:00 pm. Non-members MUST be accompanied by club members to use any of the shooting or archery ranges.

Club News

  • COSC 70th Anniversary Celebration – August 11th 12:00 pm – 4:00 pm details in the August newsletter.
  • COSC Open House – September 14th 12:00 pm – 4:00 pm Come check out all of the shooting ranges, meet members, ask questions, enjoy the day.
  • CPL courses have been added to the Firearms Training page. Take a look and schedule your August classes.
  • See the August 2019 newsletter for upcoming club activities.