While the exact same data isn't readily available on a county basis, there is some comparable information that gives us an idea of how many families experience a similar 1950's lifestyle. Admittedly the data isn't perfect. UPDATE: ACTUALLY THERE IS PRETTY CLOSE DATA IN THE ACS TO THE DATA ACCESSED BY DEMO MEMO. TABLE B23008 SHOWS THE NUMBER OF CHILDREN IN TWO PARENT FAMILIES BASED ON WHETHER BOTH PARENTS WORK, THE FATHER WORKS, OR THE MOTHER WORKS. IT DEALS WITH CHILDREN UNDER THE AGE OF 18 (VERSUS 15 IN DEMO MEMO).
So all in all it is a tenuous comparison. But regardless it does provide some insight into the number of families with children under the age of 18 where at least one parent is home - or the converse, the number of families where both parents work !
UPDATED GRAPHIC!