The legislature of the U.S. state of Oregon has convened many times since statehood became effective on February 14, 1859. It continues to operate under the amended 1857 Oregon Constitution.
| September 10, 1860 | October 19, 1860 | June 1860 | |
| September 8, 1862 | October 17, 1862 | June 1862 | |
| September 12, 1864 | October 22, 1864 | June 1864 | |
| 1866 | |||
| 1868 | |||
| 1870 | |||
| September 9, 1872 https://records.sos.state.or.us/ORSOSWebDrawer/RecordView/6785265 | |||
| 1874 | |||
| 1876 | |||
| September 9, 1878 https://records.sos.state.or.us/ORSOSWebDrawer/RecordView/6785268 | |||
| 1880 | |||
| September 11, 1882 https://records.sos.state.or.us/ORSOSWebDrawer/RecordView/6785270 | |||
| 1885 | June 1884 [2] | ||
| January 10, 1887 https://records.sos.state.or.us/ORSOSWebDrawer/RecordView/6785272 | |||
| January 14, 1889 https://records.sos.state.or.us/ORSOSWebDrawer/RecordView/6785273 | June 1888 | ||
| January 9, 1891 https://records.sos.state.or.us/ORSOSWebDrawer/RecordView/6785274 | |||
| January 9, 1893 https://records.sos.state.or.us/ORSOSWebDrawer/RecordView/6785275 | |||
| January 14, 1895 https://records.sos.state.or.us/ORSOSWebDrawer/RecordView/6785276 | |||
| January 11, 1897 https://records.sos.state.or.us/ORSOSWebDrawer/RecordView/6785277 | June 1896 | ||
| January 9, 1899 https://records.sos.state.or.us/ORSOSWebDrawer/RecordView/6785279 | |||
| January 14, 1901 | |||
| 1903 | June 1902 | ||
| 1905 | |||
| 1907 | June 1906 | ||
| 1909 | |||
| 1911 | November 1910 | ||
| 1913 | November 1912 | ||
| 1915 [3] | November 1914 | ||
| January 8, 1917 | November 1916 | ||
| 1919 | November 1918 | ||
| 1921 | November 1920 | ||
| 1923 | November 1922 | ||
| 1925 | November 1924 | ||
| 1927 | November 1926 | ||
| January 14, 1929 | November 1928 | ||
| 1931 | November 1930 | ||
| 1933 | November 1932 | ||
| 1935 | November 1934 | ||
| 1937 | November 1936 | ||
| 1939 | November 1938 | ||
| 1941 | November 1940 | ||
| 1942 | |||
| 1944 | |||
| January 13, 1947 | November 1946 | ||
| 1949 | November 1948 | ||
| 1951 | November 1950 | ||
| 1953 | November 1952 | ||
| 1955 | November 1954 | ||
| 1957 | November 1956 | ||
| 1959 | November 4, 1958 | ||
| January 9, 1961 https://records.sos.state.or.us/ORSOSWebDrawer/RecordView/6785331 | November 8, 1960 | ||
| 1963 | November 1962 | ||
| 1965 | November 1964 | ||
| 1967 | November 8, 1966 | ||
| 1969 | November 1968 | ||
| 1971 | November 3, 1970 | ||
| 1973 | November 1972 | ||
| 1975 | November 1974 | ||
| 1977 | November 1976 | ||
| 1979 | November 1978 | ||
| 1981 | November 1980 | ||
| 1983 | November 1982 | ||
| 1985 | November 1984 | ||
| 1987 | November 1986 | ||
| 1989 | November 1988 | ||
| 1991 | November 1990 | ||
| 1993 | November 1992 | ||
| 1995 | November 1994 | ||
| 1997 | November 1996 | ||
| 1999 | November 1998 | ||
| 2001 | November 2000 | ||
| 2003 | November 2002 | ||
| 2005 | November 2004 | ||
| 2007 | November 2006 | ||
| 2009 | 2008 Oregon legislative election | ||
| 2011 | 2010 Oregon legislative election | ||
| 2013 | 2012 Oregon legislative election | ||
| 2015 | 2016 Oregon legislative election | ||
| 2017 | 2018 Oregon legislative election | ||
| 2019 | November 2018 | ||
| January 11, 2021 | March 4, 2022 | November 2020: House, Senate | |
| January 9, 2023 | November 2022: House, Senate | ||
| 83rd Oregon Legislative Assembly | January 21, 2025 | November 5, 2024: House, Senate | |