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The first US census took place in 1790. Only the heads of households are named; otherwise numbers are only given for the catgories of household members. There were 977 people in Tredyffrin in 156 households. The average household size was 6.26 (this included servants and slaves).
| Column |
Description |
| 1 | Name |
| 2 | Title |
| 3 | Free white males of 16 years and upward, including heads of families |
| 4 | Free white males under 16 years |
| 5 | Free white females, including heads of families |
| 6 | All other free persons |
| 7 | Slaves |
| Acker, Joseph | | 2 | 4 | 2 | | |
| Aitken, James | | 2 | 3 | 4 | | |
| Baker, John | | 1 | 2 | 4 | | |
| Batt, Walter | | 1 | 1 | 1 | | |
| Baugh, Henry | | 1 | | 3 | | |
| Baugh, Jacob | | 5 | | 4 | | |
| Bear, Felty | | 1 | | 4 | | |
| Beaver, DeWalt | | 2 | 5 | 6 | | |
| Beaver, George | | 2 | 1 | 3 | | |
| Bleakly, John | | 1 | 1 | 2 | | |
| Boggs, Alexander | | 1 | 3 | 2 | | |
| Boggs, Joseph | | 1 | 1 | 4 | | |
| Bones, Samuel | | 1 | 1 | 2 | | |
| Bowen, John | | 1 | 1 | 2 | | |
| Bowen, Thomas | | 3 | 1 | 1 | | |
| Bowins, Peter | | 3 | 1 | 3 | | |
| Brown, Ann | | | | 3 | | |
| Brown, John | | 2 | 2 | 5 | | |
| Brown, William | | 2 | 3 | 5 | | |
| Bull, Sarah | | | 1 | 3 | | |
| Burns, Alexander | | 1 | 1 | 3 | | |
| Butler, James | | 1 | 1 | 3 | | |
| Christy, David | Doctor | 1 | 1 | 3 | | |
| Christy, John | | 2 | | | | |
| Comly, Isaac | | 3 | 2 | 4 | | |
| Craig, John | | 1 | 2 | 1 | | |
| Davis, Benjamin | | 1 | 1 | 3 | | |
| Davis, Benjamin | Mason | 1 | 3 | 5 | | |
| Davis, David | | 1 | 4 | 5 | | |
| Davis, John | | 5 | 3 | 9 | | |
| Davis, John | Captain | 3 | 3 | 4 | | |
| Davis, John | Doctor | 2 | 4 | 6 | | 1 |
| Davis, Nathaniel | | 1 | 3 | 3 | | |
| Davis, William | | 3 | 1 | 3 | | |
| Dempsey, Cornelius | | 1 | | 4 | | |
| Detwiler, John |
| 1 |
| 1 |
|
|
| Dewees, William | Colonel | 5 | 1 | 3 | 3 | 1 |
| Dice, Stophel | | 1 | | 2 | | |
| Dickey, German | | 1 | 2 | 3 | | |
| Dickinson, James | | 1 | 1 | 2 | | |
| Donaldson, William | | 1 | 1 | 1 | | |
| Eagin, George | | 1 | 1 | 6 | | |
| Edwards, John | | 1 | | 1 | | |
| Evans, Joel | | 1 | | 1 | | |
| Evans, Jonathan |
| 1 | 1 | 2 |
|
|
| Evans, Josiah |
| 1 |
| 1 |
|
|
| Evans, William |
| 1 | 1 | 4 |
|
|
| Fisher, Francis |
| 1 |
| 3 |
|
|
| Frederick, Joseph |
| 2 | 4 | 4 |
|
|
| Frick, Jacob |
| 1 |
| 2 |
|
|
| Gider, Madlin |
| 1 | 1 | 5 |
|
|
| Glasgow, Cole |
|
|
|
| 3 |
|
| Glasgow, Nancy |
|
|
| 1 |
|
|
| Goakim, John |
| 2 |
| 2 |
|
|
| Griffith, Isaac |
| 1 | 2 | 7 |
|
|
| Griffith, Joseph |
| 1 | 4 | 2 |
|
|
| Gun, John |
| 1 | 2 | 4 |
|
|
| Hager, Peter |
| 1 |
| 1 |
|
|
| Hammers, Able |
| 2 | 1 | 2 |
|
|
| Hampton, Benjamin |
| 1 | 1 | 1 |
|
|
| Hampton, John |
| 1 | 1 | 6 |
|
|
| Hampton, Joseph |
| 1 | 5 | 2 |
|
|
| Hampton, Patty |
|
1 | 2 | 1 |
|
|
| Hampton, Thomas |
| 1 | 4 | 4 |
|
|
| Havard, David |
| 1 | 2 | 5 | 2 |
|
| Havard, John |
| 3 | 1 | 2 |
|
|
| Havard, Samuel |
| 2 |
| 2 | 2 | 1 |
| Henry, John |
| 1 | 2 | 2 |
|
|
| Holliday, William |
| 1 | 2 | 4 |
|
|
| Houseman, Frederick |
| 5 | 2 | 4 |
|
|
| Howell, John |
| 1 |
| 1 | 1 |
|
| Howell, Ruce Rees |
| 2 |
| 1 |
|
|
| Hunter, David |
| 1 | 3 | 5 |
|
|
| Huzard, Henry | | 1 | 1 | 2 | | |
| Huzard, John | | 1 | 2 | | | |
| Huzzard, Jacob |
| 3 | 1 | 4 |
|
|
| John, Thomas |
| 3 |
| 2 |
|
|
| Johnston, John |
| 3 |
| 4 |
|
|
| Jones, Benjamin |
| 2 | 1 | 6 |
|
|
| Jones, Edward |
| 2 |
| 3 |
|
|
| Jones, Enoch |
| 1 | 4 | 4 |
|
|
| Jones, Levi |
| 3 | 1 |
1 |
2 |
|
| Jones, Nathaniel |
| 3 | 2 |
5 |
|
|
| Jones, Thomas |
| 3 |
|
2 |
|
|
| Kelly, Edward |
| 1 |
|
1 |
|
|
| Keyce, William |
| 2 |
|
4 |
|
|
| Keyles, Jacob |
| 3 | 2 | 4 |
|
|
| Kitzelman, Jacob |
| 3 |
| 1 |
|
|
| Kugler, John |
| 1 | 7 | 2 |
|
|
| Kyle, William |
| 1 |
| 2 |
|
|
| Laurines, Jonathan |
| 1 | 1 | 4 |
|
|
| Lewis, Elisabeth | | 2 | | 1 | | |
| Madden, Daniel |
| 1 | 1 |
3 |
|
|
| Mall, John |
| 1 | 3 |
2 |
|
|
| Matthews, William |
| 1 | 1 | 1 |
|
|
| Maxwell, David |
| 1 |
|
1 |
|
|
| Maxwell, John |
| 3 | 2 |
3 |
|
|
| McClure, Alexander |
| 1 |
|
2 |
|
|
| McConnel, John |
| 1 |
|
2 |
|
|
| McKinney, John |
| 1 |
|
3 |
|
|
| McKinsley, Roderick |
| 1 | 3 |
4 |
|
|
| McLain, Charles |
| 3 | 1 |
3 |
|
|
| McLeer, Michael |
| 1 | 2 |
2 |
|
|
| McVaugh, Jeremiah |
| 1 |
|
6 |
|
|
| Meredith, Jonathan | | 1 | 1 | 4 | | |
| Miles, Nathan |
| 2 |
|
3 |
|
|
| Miles, Richard |
| 3 | 2 |
6 |
|
|
| Moore, Moses |
| 2 | 2 |
3 |
|
|
| Myers, Charles |
| 1 | 2 |
1 |
|
|
| Neely, James |
| 3 | 3 |
2 |
|
|
| Neely, Matthew |
| 2 | 3 |
5 |
|
|
| Painter, John & Razer, William |
| 2 | 1 |
2 |
|
|
| Parker, John |
| 1 |
|
3 |
|
|
| Patterson, Mary |
|
| 1 |
3 |
|
|
| Pennington, Paul |
| 1 | 2 |
3 |
|
|
| Pennington, Thomas |
| 2 | 1 |
3 |
|
|
| Pogue, James |
| 1 |
|
1 |
|
|
| Potts, William |
| 3 | 1 | 10 | 1 |
|
| Pugh, Job |
| 1 |
|
2 |
|
|
| Richards, Daniel |
| 1 | 1 |
3 |
|
|
| Rickabaugh, Adam |
| 4 | 1 | 5 |
|
|
| Rider, John |
| 1 | 1 | 3 |
|
|
| Robison, Richard |
| 4 |
| 4 |
|
|
| Rodgers, Robert |
| 2 | 4 | 2 |
|
|
| Rowland, Benjamin |
| 1 | 3 | 4 |
|
|
| Rowland, John |
| 6 | 2 | 4 |
|
|
| Roxborough, John | | 1 | | 2 | | |
| Rees, Able | | 3 | 3 | 4 | | |
| Sharp, Thomas |
| 1 | 1 | 2 |
|
|
| Showalter, John |
| 2 |
| 2 |
|
|
| Simonton, John |
| 2 |
| 1 | 2 |
|
| Snider, Henry |
| 1 | 1 | 1 |
|
|
| Steele, Andrew |
| 1 |
| 1 |
|
|
| Stephens, Abijah |
| 4 | 1 | 5 |
|
|
| Stone , Andrew |
| 2 | 3 | 5 |
|
|
| Taylor, Henry |
| 1 | 1 | 1 |
|
|
| Teiston, Thomas |
| 2 | 3 | 2 |
|
|
| Thomas, Able |
| 2 |
l | 5 |
|
|
| Thomas, Isaac |
| 2 | 3 | 6 |
|
|
| Thomas, John |
| 3 | 2 | 4 |
|
|
| Thomas, Nathan |
| 2 | 2 | 2 |
|
|
| Thomas, Vjm |
| 2 | 1 | 3 |
|
|
| Thundertond, Nicholas |
| 2 |
| 1 |
|
|
| Detwiler, Jacob |
| 1 |
|
|
|
|
| Vance, Jacob |
| 1 |
| 1 | 1 |
|
| VanLeer, Isaac |
| 1 | 4 | 3 |
|
|
| Walker, Isaac |
| 2 | 2 | 6 |
|
|
| Walker, Jacob |
| 3 | 4 | 2 |
|
|
| Walker, Joseph |
| 4 | 2 | 4 | 1 |
|
| Walker, Thomas |
| 2 |
| 2 | 1 |
|
| Walker, Thomas G. |
| 3 | 1 | 2 |
|
|
| Watts, Joel |
| 1 |
| 1 |
|
|
| Wilson, David |
| 4 | 1 | 6 | 2 |
|
| Woodman, Edward |
| 2 | 1 | 2 |
|
|
| Workhizer, Margaret | | 4 | 1 | 6 | | |
Zook, Henry | | 4 | 3 | 5 | | |
|