[3] In 1950, Royer's political career began when he served on the Redwood City Council until 1966.

In 1972, Royer was elected to the San Mateo County Board of Supervisors and in 1976, he was reelected.

[1] In 1979, Royer won a special election to succeed the late congressman Leo J. Ryan (D-San Mateo), winning with 57% of the vote.

In the 1980 election, Royer was defeated, losing 46.4% to 43.3% to Democratic challenger Tom Lantos.

[2] Royer's nephew Jim Harnett is also a politician, as mayor of Redwood City.