Alan Randal Olsen is an American Republican politician who served in the Oregon State Senate from 2011 until 2021, representing Oregon's 20th Senate district in southeastern Clackamas County, including the cities of Barlow, Canby, Gladstone, Johnson City, Oregon City, and portions of Milwaukie. He defeated incumbent Democrat Martha Schrader in the 2010 election.

A series of Oregon Republican State Senator walkouts began in May 2019 when Republican members of the Oregon State Senate refused to attend floor sessions of the Oregon Senate in an effort to stymie Democratic efforts to pass House Bill 3427. Proposed during the 80th Oregon Legislative Assembly, the bill would have provided $2 billion for K-12 schools through a new tax package. The senators eventually returned after reaching a deal with Oregon Senate Democrats and Oregon Governor Kate Brown, but elected to "vanish" the following month over another bill, House Bill 2020. House Bill 2020 is designed to institute a carbon tax in Oregon. Republican senators argue that it would unduly burden their constituents, while Democrats argue it is necessary to place Oregon at the forefront of the fight against climate change.