| 1835–1838 | Missionary priests from Northern Pennsylvania & Southern New York ministered to the people |
| 1853 | Church on Erie Street dedicated on July 23 with Mass by Rev James McManus |
| 1860 | St James Cemetery established |
| 1871 | Church on Clark Street dedicated on September 1 under the direction of Rev James Rogers |
| 1881 | Separated from the Owego Mission in January |
| 1891 | August 5 Certificate of Incorporation for St James Parish |
| 1896 | By papal brief (December 12) Tioga County became part of the Rochester Diocese |
| 1897 | 1st canonical visit by Bp McQuaid (1st Bishop of Rochester) |
| 1912 | Church destroyed by fire on March 17 |
| 1913 | New church replaced burned one and was dedicated on November 23 by Msgr James Griffin |
| 1934 | Rev Edward Lyons built rectory addition with kitchen, 2-car garage, study, bedroom & bath |
| 1949 | Social Hall added in the basement by Rev Robert J Fox |
| 1954 | St James School opened with eight grades and staffed by the Sisters of St Joseph |
| 1957 | Fr Thomas Watts, a parishioner of St James, is ordained |
| 1959 | Two rooms were added to the existing school |
| 1983 | Fr Thomas Watts appointed pastor |
| 1988 | St James School closed due to lower enrollments and lack of funds |
| 2001 | Dcn Ray Defendorf appointed Pastoral Administrator |
| 2003 | Blessed Trinity Parish formed and Rev William A Moorby appointed Pastor |
