Why can't I find any census information?

Question:

Why can't I find any census information?

I have a pedigree chart of my family ZINN from 1742-1878, within the states of PA, WV, VA, and IL. I have the county and most of the time the town of residence, as well as names and dates of births, deaths, and marriages. I've looked at many censuses for any of my ancestors during these times and states, and cannot find a single census record. What might be the cause?

Additional Details

4 weeks ago
I am aware that names can be spelled incorrectly. The closest name I can find on any census is Zimmerman, which is nowhere near Zinn.

Best Answer - Chosen by Asker: 4 weeks ago
I am aware that names can be spelled incorrectly. The closest name I can find on any census is Zimmerman, which is nowhere near Zinn.