Hi-sorry I didn't get these posted sooner!
(I only grabbed your Allegheny County ones
per your request, which helped because there
were numerous listings.)
~~~~~1830 PA Census Index
Allegheny County ONLY
Surname: BENSON
James p. 329 Indiana Twp
John p. 173 Plum Twp
William p. 235 St. Clair
(there were over 40 other BENSONS listed)
~~~~~1820 PA Census Index
Allegheny County ONLY
Surname: BENSON
John p. 203 Plumb T
(there were over 20 other BENSONS listed)
~~~~~1810 PA Census Index
Allegheny County ONLY
Surname: BENSON
John p. 211 Pittsburg
~~~~~1800 PA Census Index
Allegheny County ONLY
Surname: BENSON
William p. 25
~~~~~1790 PA Census
(None in Allegheny County so I grabbed the ONLY 3 listed)
Benson, Alexander p. 218 Phil Co
2 M (over 16) 4 M (under 16), 2 F, 0 slaves
Benson, Isaac p. 246 Washington Co.
1 M (over 16) 2 M (under 16), 2 F, 0 slaves
BEnson, John p. 159 Montgomery Co
1 M (over 16), none under 16, 3 F, 0 slaves
Hope this helps the research!
Sandymento