We calculate the Néel temperature ${\mathit{T}}_{\mathit{N}}$ for two-dimensional isotropic dipolar Heisenberg antiferromagnets via linear spin-wave theory and a high-temperature expansion, by employing the method of Callen. The theoretical predictions for ${\mathit{T}}_{\mathit{N}}$ for ${\mathrm{K}}_2$${\mathrm{MnF}}_4$, ${\mathrm{Rb}}_2$${\mathrm{MnF}}_4$, ${\mathrm{Rb}}_2$${\mathrm{MnCl}}_4$, and (${\mathrm{CH}}_3$${\mathrm{NH}}_3$${)}_2$${\mathrm{MnCl}}_4$ are in good agreement with the measured values.

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