District 5 of the Oregon State Senate comprises all of Lincoln County on the central Oregon Coast, as well as parts of Benton, Coos, Douglas, and Lane counties. It is composed of Oregon House districts 9 and 10. It is currently represented by Republican Dick Anderson of Lincoln City.

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 central Washington County; from 2003 until 2013, it shifted to cover the entire Oregon Coast from the Bandon Dunes Golf Resort north to the northern border of Lincoln County while also including small panhandles of Tillamook and Yamhill counties and the Grand Ronde Community in Polk County; and from 2013 until 2023, it extended to cover more of Polk, Tillamook, and Yamhill counties, stretching north to Netarts and the southern parts of Tillamook.

The current district is similar to previous iterations with the exception of the loss of all lands in Polk, Tillamook, and Yamhill counties and the gain of all of Benton County outside of the Corvallis and Adair Village areas, including Philomath.

The results are as follows:^[1]