A chapter is an organization of members of the fraternity attached to an institution or geographic location[1] which has received a charter authorizing it to operate as the local unit of Lambda Chi Alpha.
[2] At the fraternity's inception, founder Warren A. Cole assigned Greek letters to petitioning groups that had not yet been chartered.
As a result, the first seven chapters were designated Α, Γ, Ε, Ζ, Ι, Λ, and Β, in that order.
Therefore, the chapters are named in the order: Α, Γ, Ε, Ζ, Ι, Λ, Β, Σ, Φ, Δ, Π, Ο, Μ, Τ, Η, Θ, Υ, Ξ, Χ, Ω, Κ, Ν, Ρ, Ψ.
After the twenty-fourth chapter, the sequence was continued with a prefix and hyphen (Α-Α, Α-Γ, Α-Ε, ... Γ-Α, Γ-Γ, Γ-Ε, ... Ε-A, etc.)