Dennis Michael Richardson (July 30, 1949 – February 26, 2019) was an American attorney, businessman, and politician who served as the 26th Secretary of State of Oregon from 2017 until his death in 2019.

He represented House District 4, which included portions of Jackson and Josephine counties, and was the Republican nominee for Governor of Oregon in the 2014 election, losing to incumbent Democrat John Kitzhaber.

In 2000, Richardson was recruited to serve on the Central Point City Council, which helped inspire his decision to run for the Oregon State Legislature.

Later in 2011, Richardson was selected to oversee the $55 billion combined state budgets as co-chair of the Full Joint Senate–House Ways and Means Committee.

In July 2013, Richardson announced his candidacy as a Republican candidate for the Governor of Oregon in 2014, with a strong focus on small business growth in the state.

[9] Although insufficient to turn the tide on election day, newly re-elected Governor John Kitzhaber announced his resignation three months later on February 13, 2015.

[10] In October 2015, Richardson announced he would be running for Oregon Secretary of State in 2016, hoping to replace Democratic incumbent Jeanne Atkins, who had been appointed by Governor Kate Brown following Brown's ascension to the state's highest office due to then current Governor John Kitzhaber resigning amid an ethics scandal involving his fiancée.