Here’s a complete list of Greek letters in LaTeX:

Lowercase Greek Letters

\alpha      % α
\beta       % β
\gamma      % γ
\delta      % δ
\epsilon    % ε
\zeta       % ζ
\eta        % η
\theta      % θ
\iota       % ι
\kappa      % κ
\lambda     % λ
\mu         % μ
\nu         % ν
\xi         % ξ
\omicron    % ο
\pi         % π
\rho        % ρ
\sigma      % σ
\tau        % τ
\upsilon    % υ
\phi        % φ
\chi        % χ
\psi        % ψ
\omega      % ω

Uppercase Greek Letters

\Alpha    % Α
\Beta     % Β
\Gamma    % Γ
\Delta    % Δ
\Epsilon  % Ε
\Zeta     % Ζ
\Eta      % Η
\Theta    % Θ
\Iota     % Ι
\Kappa    % Κ
\Lambda   % Λ
\Mu       % Μ
\Nu       % Ν
\Xi       % Ξ
\Omicron  % Ο
\Pi       % Π
\Rho      % Ρ
\Sigma    % Σ
\Tau      % Τ
\Upsilon  % Υ
\Phi      % Φ
\Chi      % Χ
\Psi      % Ψ
\Omega    % Ω

Note: Some uppercase Greek letters (Α, Β, Ε, Ζ, Η, Ι, Κ, Μ, Ν, Ο, Ρ, Τ, Χ) look identical to Latin letters, so you just type them normally in LaTeX.

Alternative Forms

\varepsilon  % 𝜀 (variant epsilon)
\vartheta    % 𝜗 (variant theta)
\varpi       % 𝜛 (variant pi)
\varrho      % 𝜚 (variant rho)
\varsigma    % 𝜍 (final sigma)
\varkappa    % 𝜘 (variant kappa)
\varphi      % 𝜑 (variant phi)

Archaic Greek letters

\digamma  % ϝ (lowercase Digamma)
\Digamma  % 𝟊 (capital Digamma)

Example in LaTeX Code

\documentclass{article}
\begin{document}
Here are some Greek letters in LaTeX: $\alpha, \beta, \gamma, \Delta, \Theta, \Omega$.
\end{document}

The above LaTeX code should display something like:

• Here are some Greek letters in LaTeX: $\alpha, \beta, \gamma, \Delta, \Theta, \Omega$.