To estimate the number of millennial homeowners in the US, we can start with the millennial population and apply relevant homeownership rates. Given there are approximately 70 million millennials in the US and a lower-than-average homeownership rate for this demographic, we can infer a significant portion, but not all, own homes. Considering the total US population is around 300 million and there are about 130 million housing units, we can use these broader figures to contextualize millennial homeownership. A reasonable estimate would involve factoring in the age range of millennials (roughly 18-36) and their current propensity to own property, which is generally lower than older generations at similar life stages. A detailed breakdown would involve researching current millennial homeownership rates and applying them to the 70 million figure, while acknowledging that not all millennials fall within the prime home-buying years.