USGenWeb Free Census Project, Notices, Key to 1840 Census Columns
| Key to 1840 Census Columns: | |
| Abbreviation | Description |
| LINE | Line Number |
| Firstname | First Name |
| Lastname | Last Name |
| White Males | (Age Ranges from top number to bottom number.) |
| White Females | (Age Ranges from top number to bottom number.) |
| Free Male Colored Persons | (Age Ranges from top number to bottom number.) |
| Free Female Colored Persons | (Age Ranges from top number to bottom number.) |
| Male Slaves | (Age Ranges from top number to bottom number.) |
| Female Slaves | (Age Ranges from top number to bottom number.) |
| To | Total Column |
| Occupation - Mi | Mining |
| Occupation - Ag | Agriculture |
| Occupation - Co | Commerce |
| Occupation - Ma | Manufacture |
| Occupation - Oc | Navigation of Oceans |
| Occupation - Ri | Navigation of Rivers |
| Occupation - Pr | Professional |
| Pensioner Name | |
| Pensioner Age | |
| White Deaf & Dumb | (Age Ranges from top number to bottom number.) |
| White Blind | |
| White Insane and Idiots at Public Charge | |
| White Insane and Idiots at Private Charge | |
| Colored Deaf & Dumb | (Age Ranges from top number to bottom number.) |
| Colored Blind | |
| Colored Insane and Idiots at Public Charge | |
| Colored Insane and Idiots at Public Charge | |
| School - Name of College | |
| School - Number of College Students | |
| School - Name of Academics and Grammar Schools | |
| School - Number of Academics and Grammar School Students | |
| School - Name of Primary and Common | |
| School - Number of Primary and Common School Students | |
| Number of Scholars at Public Expense | |
| Number of white persons over the age of 20 in each family who can not read or write. | |
| Remarks | Transcriber's Remarks |
