No Sandra Day O'Connor in 1930
"Sandra Day O'Connor was born on March 26, 1930 in El Paso, Texas, the daughter of Harry A. Day and Ada Mae Wilkey Day, but grew up in southeastern Arizona on a cattle ranch owned by her parents."
We cannot find her--either here with her parents or with either set of grandparents. Of course, the former Supreme Court Justice is not missing any more, but one wonders why she was not enumerated in the census as she technically should have been.
Just something to think about when you can't find your in the 1930 census index .