| Surname | Given Name | School | Date | Residence | Remarks |
| Sickles | Katherine | Gorton | School a.k.a. Stebbins. | ||
| Siebert | Frieda | Collins | School a.k.a. German. | ||
| Sill | Julia M., Mrs. | Plano High | ca 1860 | Principal | |
| Silvis | Mary | Willow Hill | 1920-1921 | School a.k.a. Albee & Schell. | |
| Simon | Mr. | Fowler Institute | Big Grove Twp. | ||
| Simpkins | Elizabeth | Hiddleson | 1918-1919 | School a.k.a. Lehman. | |
| Simpson | Jennie | Scofield | 1869-1870 | School a.k.a. Red School. | |
| Sinclair | Etta | Plano Grade | Little Rock Twp. | ||
| Skelly | Julia M. | Bristol Station | Bristol Twp. | ||
| Skinner | Fay, Miss | Rickard | 1897-1900 | Bristol Twp. | |
| Skinner | Kathryn | Lisbon | 1889-1892 | Primary department | |
| Skinner | Stella | Little Rock | Little Rock Twp. | ||
| Slade | Henry M. | Lisbon Academy | Son of Governer Slade of MA. | ||
| Sleezer | Clara | Sleezer | School a.k.a. Havenhill. | ||
| Sleezer | Ethel (Kilts) | Wynne | School a.k.a. Todd. | ||
| Sleezer | Ethel (Kilts) | Union | 1914-1915 | NaAuSay Twp. | |
| Sleezer | Lillie | Big Grove | 1884-1885 | Big Grove Twp. | |
| Sleezer | Miss | Sleezer | 1871-1872 | School a.k.a. Havenhill. | |
| Sloan | Mrs. | Newark | ca 1837 | Teacher in school in Gridley's Grove. | |
| Sly | Anna | Sandy Bluff | School a.k.a. Tolman. | ||
| Sly | Mr. | Plano Academy | Principal | ||
| Small | Phoebe | Squires | School a.k.a. Pearce. | ||
| Smiley | Lettie | Collins | School a.k.a. German. | ||
| Smiley | Sara L. | Collins | School a.k.a. German. | ||
| Smith | A. J., Mr. | Pletcher | 1870-1871 | Lisbon Twp. | |
| Smith | Ada | Atherton | 1872-1873 | Fox Twp. | |
| Smith | Amelia | Greenfield | School a.k.a. Darnell & Rogers. | ||
| Smith | Amy B. | Isaac Anderson | 1903-1904 | School a.k.a. Crum & Preston. | |
| Smith | Amy B. | Little Rock | Little Rock Twp. | ||
| Smith | Ann Eliza | McKanna | Seward Twp. | ||
| Smith | Austin J. | Pletcher | 1869-1870 | Lisbon Twp. | |
| Smith | Cassie | Bristol Station | Bristol Twp. | ||
| Smith | Charles | Gaylord | School a.k.a. Suydam. | ||
| Smith | David | 1880 | NaAuSay Twp. | ||
| Smith | Della B. | White Willow | 1934-1935 | Aurora | Lisbon Twp. |
| Smith | Della B. | Willow Hill | 1937-1938 | Aurora | School a.k.a. Albee & Schell. |
| Smith | Della B. | Willow Hill | 1930-1931 | Aurora | School a.k.a. Albee & Schell. |
| Smith | Electra | Plano Gravel School | Little Rock Twp. | ||
| Smith | Elizabeth | Bristol | Bristol Twp. | ||
| Smith | Elizabeth | Plano Gravel School | Little Rock Twp. | ||
| Smith | Elizabeth | Sears | 1861-1862 | Little Rock Twp. | |
| Smith | Elizabeth | Stebbins (cement) | (1851-1866) | School a.k.a "Gravel School." | |
| Smith | Elizabeth | Yorkville | Teacher in school, N.E. cr. Madison & Adams. | ||
| Smith | Erastus | Bristol Station | Bristol Twp. | ||
| Smith | Georgiana | Plano Academy | Principal | ||
| Smith | Georgiana | Stebbins (cement) | (1851-1866) | School a.k.a "Gravel School." | |
| Smith | Henry | Inscho | 1873-1874 | School a.k.a. Martner & Roberts. | |
| Smith | Henry | Inscho | 1873-1874 | School a.k.a. Martner & Roberts. | |
| Smith | Jennie | Pletcher | Lisbon Twp. | ||
| Smith | Joseph A. | Pletcher | Lisbon Twp. | ||
| Smith | Laura M. | Gaylord | 1918-1919 | School a.k.a. Suydam. | |
| Smith | Libbie | Ryan | Little Rock Twp. | ||
| Smith | Louisa | 1860 | Oswego Twp. | ||
| Smith | Luther | Gorton | 1866 | First teacher | |
| Smith | Luther | Hiram Brown | Little Rock Twp. | ||
| Smith | M. C. | Bristol | Bristol Twp. | ||
| Smith | Mary | Wilcox | Oswego Twp. | ||
| Smith | Mary | Stebbins (cement) | (1851-1866) | School a.k.a "Gravel School." | |
| Smith | Mary E. | Minkler | 1897 | Kendall Twp. | |
| Smith | Mary E. | Walker | 1894 | Oswego Twp. | |
| Smith | Minnie | Scott/Tyler | School renamed Tyler. | ||
| Smith | Mr. | Faxon | Bristol & Little Rock Townships. | ||
| Smith | Myrtle (Ebinger) | Harvey | 1910-1913 | School a.k.a. Updike. | |
| Smith | Myrtle (Ebinger) | Walker | Oswego Twp. | ||
| Smith | Nellie | Cutter | 1885-1886 | School a.k.a. Cowdrey & Fox. | |
| Smith | W. F., Mr. | Chapman | 1870-1871 | School a.k.a. Peter O'Brien. | |
| Snooks | Albert E. | Stone School | (1852-1885) | Principal | |
| Snooks | Albert E. | Squires | School a.k.a. Pearce. | ||
| Snyder | Mazie | Lisbon Center | Lisbon Twp. | ||
| Snyder | O. E. | Lisbon Academy | Private school in Lisbon, IL. | ||
| Snyder | Roy | Holderman | School a.k.a. Stephen & Hoge. | ||
| Sorenson | Catherine | Bristol Station | Bristol Twp. | ||
| Southcombe | Amelia "Nelia" | Booth | 1891-1892 | Lisbon Twp. | |
| Southcombe | Amelia "Nelia" | Booth | 1896-1897 | Lisbon Twp. | |
| Southcombe | Amelia "Nelia" | Naden | 1890-1891 | Big Grove Twp. | |
| Southworth | Delia | Greenfield | School a.k.a. Darnell & Rogers. | ||
| Spach | Elizabeth | Greenfield | School a.k.a. Darnell & Rogers. | ||
| Spach | Elizabeth | Scofield | School a.k.a. Red School. | ||
| Spanswick | Jennie | Naden | 1872-1873 | Big Grove Twp. | |
| Spencer | Amelia | Holderman | School a.k.a. Stephen & Hoge. | ||
| Spencer | Amelia | Faxon | 1870-1872 | Bristol & Little Rock Townships. | |
| Spencer | Amelia | Yorkville Grade | 1873-1874 | Kendall Twp. | |
| Spencer | Emma | Faxon | Bristol & Little Rock Townships. | ||
| Spencer | Kathryn | Gorton | School a.k.a. Stebbins. | ||
| Spencer | Kathryn | Faxon | 1872-1873 | Bristol & Little Rock Townships. | |
| Spridgen | William, Mrs. | Porter | Lisbon Twp. | ||
| Springer | Izilla | Hiram Brown | Little Rock Twp. | ||
| Springer | Izilla | Minkler | 1837- | Teacher in log school opened in 1835. | |
| Spurnry | Ellen, Mrs. | Fern Dell | 1921-1922 | School a.k.a. Edgerton & Neff. | |
| Stade | C. M. | Scott/Tyler | School renamed Tyler. | ||
| Stahl | Lottie | Millbrook | 1872-1873 | Fox Twp. | |
| Stahle | Agnes (Johnson) | Millington | Fox Twp. | ||
| Staley | Miss | 1912-1913 | |||
| Staley | Mr. | Harvey | School a.k.a. Updike. | ||
| Stangeland | Mae | Millbrook | Fox Twp. | ||
| Stanley | Florence | Willow Hill | School a.k.a. Albee & Schell. | ||
| Stannard | Horace | Cherry | 1855-1856 | School a.k.a. Grove. | |
| Stannard | Horace | Russell | ca 1840 | Graduate of Oxford University, England. | |
| Stansel | Belle | Yorkville High | 1909-1910 | Second Assistant | |
| Stanton | Hettie (House) | Millbrook | Fox Twp. | ||
| States | Helen M. | Bell | 1934-1935 | Seward Twp | |
| Stebbins | W. J., Mr. | Newark | 1897-1899 | Principal | |
| Stephen | C. N. | Holderman | School a.k.a. Stephen & Hoge. | ||
| Stephen | W. J. | Holderman | School a.k.a. Stephen & Hoge. | ||
| Stephens | Alvin | Hiram Brown | Little Rock Twp. | ||
| Stephens | Miss | 1912-1913 | |||
| Stephenson | Mr. | Chapman | 1849 | First teacher | |
| Sterling | Daniel R. | Newark | Principal | ||
| Sterling | Daniel R. | Bethel | 1890 | NaAuSay Twp. | |
| Sterling | Daniel R. | Bristol Station | 1891-1892 | Intermediate department | |
| Stevenson | Minnie | Brown | 1883-1884 | School a.k.a. Stephen W. Brown. | |
| Steward | Emma V. | Cherry | 1869-1870 | School a.k.a. Grove. | |
| Steward | Nina | Plano Grade | 1880-1881 | Teacher, first intermediate department. | |
| Steward | Sarah L. | Plano Academy | Principal | ||
| Stinson | J. B., Mr. | Plano Academy | 1855-1856 | First teacher in Plano Academy. | |
| Stockham | Isabelle R. | Wormley | 1934-1935 | Oswego Twp. | |
| Stocksleger | Esther | Gorton | School a.k.a. Stebbins. | ||
| Stocksleger | Nancy | Bertram | Across county line in Kane County. | ||
| Stocksleger | Nancy | Gorton | 1871-1872 | School a.k.a. Stebbins. | |
| Stocksleger | Nancy | Rickard | 1870-1871 | Bristol Twp. | |
| Stockton | Mary | Minkler | 1837- | Teacher in log school opened in 1835. | |
| Stolp | Artie | Martin | Seward Twp. | ||
| Stolp | Emma | Heap | Seward Twp. | ||
| Stolp | Irene | Kendall | School a.k.a. Shepard. | ||
| Stolp | Nellie | Heap | Seward Twp. | ||
| Stolp | Nellie | Booth | 1870-1871 | Lisbon Twp. | |
| Stolp | Nellie | McKanna | 1870-1873 | Seward Twp. | |
| Stone | Mr. | Lisbon | ca 1840 | Lisbon Twp. | |
| Storey | Mrs. | Isaac Anderson | School a.k.a. Crum & Preston. | ||
| Storey | Oscar | Isaac Anderson | School a.k.a. Crum & Preston. | ||
| Storey | Susan | 1860 | |||
| Stowell | Anna | Albee | ca 1840 | Teacher in Walter Selvey's house. | |
| Stratton | Florence, Mrs. | McKanna | 1884-1885 | Seward Twp. | |
| Strayer | James A. | Cross Lutheran | 1929-1934 | Kendall Twp. | |
| Stromme | Carl | Helmar Parochial | Kendall Twp. | ||
| Stumbo | Edward | Plattville | Lisbon Twp. | ||
| Suhler | Stella | Walker | 1857 | Oswego Twp. | |
| Sullivan | Hazel E. | Scofield | School a.k.a. Red School. | ||
| Sullivan | Libbie | Fowler Institute | Big Grove Twp. | ||
| Sullivan | Mr. | Boomer | Later on editorial staff Chicago Journal. | ||
| Summerfield | Esther | Bell | 1872-1873 | Seward Twp | |
| Sutherland | Mary | Newark | Assistant Principal | ||
| Sutherland | W. J. | Bristol-Yorkville | 1892-1895 | Superintendent | |
| Swanberg | Mrs. | Atherton | Fox Twp. | ||
| Swanson | Oscar | Plattville | 1902-1903 | Lisbon Twp. | |
| Swarthwout | Alice | Harvey | 1870-1871 | School a.k.a. Updike. | |
| Swarthwout | F., Miss | 1860 | Oswego Twp. | ||
| Swarthwout | Hettie | Oswego Grade | 1884-1886 | Intermediate department | |
| Swarthwout | L., Miss | Oswego Grade | Teacher in school near Oliver Hebert's shop. | ||
| Swarthwout | L., Miss | Harvey | School a.k.a. Updike. | ||
| Swartz | Miss | Porter | Lisbon Twp. | ||
| Sweeney | Catherine | Booth | 1914-1919 | Lisbon Twp. | |
| Sweeney | Catherine | Chapman | School a.k.a. Peter O'Brien. | ||
| Sweeney | Catherine | Henderson | 1913-1914 | Seward Twp. | |
| Swenson | Leota (Anderson) | Harvey | 1936-1937 | School a.k.a. Updike. | |
| Swift | Samuel | Little Rock Twp | 1836 | Teacher in school Barnabas Eldridge's farm. | |
| Switzer | Helen | Little Rock | 1937-1938 | Sandwich | Primary department |
| Sylvins | Mary | Cutter | School a.k.a. Cowdrey & Fox. |
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