North Tama County joined the Iowa Star in 2003, leaving the North Iowa Cedar League.[3]
Former member CAL (Coulter-Alexander-Latimer) last had their own high school in the 2017–18 school year. After many years of sharing sports teams with Dows High School, and competing as CAL–Dows, Dows left the agreement and partnered with Clarion–Goldfield for the 2014–15 school year. The CAL school district still supports grades K–6, with grades 7–12 attending Hampton–Dumont; the athletic teams are referred to as Hampton-Dumont-CAL.[4]
Members Baxter and Collins–Maxwell formerly partnered in sports, which Baxter ended that agreement to compete on their own in 2016. Both schools joined the conference separately in 2017.[5]
BCLUW (Conrad) joined the Iowa Star Conference starting with the 2022-23 school year. BCLUW formerly competed in the North Iowa Cedar League.[6][7]
On August 15, 2022, it was announced that Rockford would be joining the North Division from the Top of Iowa Conference East Division in the 2023-2024 school year.[8]
On October 16, 2025, the North Butler Community School District announced it had accepted the invitation to join the Iowa Star Conference - North Division for the 2026-2027 calendar. North Butler is leaving the Top of Iowa Conference.[9] Nashua-Plainfield Community School District would also be joining from the Top of Iowa Conference.[10]
On January 23, 2026, the AGWSR Community School District announced it had accepted the invitation to join the Iowa Star Conference in 2027, leaving the North Iowa Cedar League.[11]
