The 57th Oregon Legislative Assembly convened for its regular session from January 8 to July 6, 1973.

[2] Both houses were controlled by the Democratic Party of Oregon.

Jason Boe was the Senate president;[3] Eymann would serve as Speaker only during the 57th legislature;[4] Boe would continue as President through the 1980 special session.

The 57th legislature passed sweeping legislation, most notably Senate Bill 100, which established a framework for land use planning in the state.

[6] Bill McCoy, the first African American elected to Oregon's legislature, served his first term in the House during this session.