Oregon's 28th Senate district

District 28 of the Oregon State Senate comprises all of Klamath County as well as parts of Deschutes and Jackson counties. The district is composed of Oregon House districts 55 and 56. It is currently represented by Republican Dennis Linthicum of Bonanza.

Election results
District boundaries have changed over time. Therefore, senators before 2013 may not represent the same constituency as today. From 1993 until 2003, it covered parts of north-central and eastern Oregon; from 2003 until 2013, the district shifted to its current location covering central and southern Oregon, incorporating all of Crook and Klamath counties as well as parts of Deschutes, Jackson, and Lake counties; and from 2013 until 2023, the borders of the district changed only marginally, losing a small area in Jackson County and picking up much of southern Deschutes County.

The current district is similar to its previous iterations, but with some major changes. The district no longer covers any of Crook or Lake counties while covering more of southern Deschutes County.

The results are as follows: