District boundaries have changed over time. Therefore, senators before 2021 may not represent the same constituency as today. From 1993 until 2003, the district covered the southern Oregon Coast; from 2003 until 2013, it shifted to cover outer east Portland and Happy Valley; and from 2013 until 2023, it lost much of its southeastern portion, including Happy Valley, while gaining parts of Clackamas.
The current district is somewhat similar to its previous iteration. It regained its coverage of east Portland while having its Clackamas County lands shift to the southeast, now covering greater Damascus and only the eastern part of Happy Valley.
^Kayse Jama was the incumbent in this election after being appointed to the seat in 2021 after the resignation of Shemia Fagan, who was elected Oregon Secretary of State.