Apparatus design and procedures are described for the determination of the vapor pressures of naturally occurring neon (^natNe) and the pure isotopes ²⁰Ne and ²²Ne from their triple points (TP) to their normal boiling points (NBP). The data have been fitted to vapor-pressure equations with root-mean-square deviations of ± 2.5 to ± 4.7 N/m² (± 0.019 to ± 0.035 mmHg). The TP pressures (P) and the TP and NBP temperatures (T) were found to be:TPNBPPT, KT, K^natNe43332 ± 13 N/m² (325.02 ± 0.10 mmHg)24.553 ± 0.00127.096 ±0.001²⁰Ne43326 ± 13 N/m² (324.97 ± 0.10 mmHg)24.540 ± 0.00127.084 ± 0.001²²Ne43654 ± 13 N/m² (327.43 ± 0.10 mmHg24.687 ± 0.00127.211 ± 0.001(The temperatures are in terms of the NBS-1955 provisional temperature scale. The figures after the ± symbol indicate estimated uncertainties). The calculated vapor pressures of the isotopic ^natNe, based on Raoult's law of solution and the observed vapor pressures of the pure isotopes, are in agreement within the combined precision of the measurements with the observed values of ^natNe.