The characteristics of twelve industrial‐grade and one precision platinum resistance thermometers for temperatures from 66 to 300 K and in magnetic fields up to 19 T are described. The results from the 13 models from nine suppliers are combined to produce mean values that may be used to correct any of those thermometers for effects of a magnetic field parallel to its long axis. The correctability error at 19 T is less than ±0.3% between 66 and 110 K and less than ±0.1% above 110 K. Magnetoresistance data for Rh–Fe and Au–Mn resistance thermometers are also presented.