Wow! The U.S. Government just released its census records from 1950. By law, those records were kept confidential for 72 years. Now they're available and you can search them by name.
I found my mother's family, shown in the detail provided. The entry identifies my mom as a "step-daughter" (which was a family secret; I wasn't told her "father" wasn't her biological dad until my adulthood). The entry also lists my mother's two younger sisters but doesn't include her youngest brother because he wasn't born yet. My mom was 13 years old when this form was filled out.
You can search for your family here: link