She was elected mayor of Eugene, Oregon in 2004,[1] and was re-elected in 2008, and again in 2012, serving three full terms until January 2017.

Piercy supported the west Eugene extension of Lane Transit District's bus rapid transit system, having voted for it in her capacity as city representative to the regional Metropolitan Planning Commission.

Proponents include local elected bodies, Lane Transit District, community members and the Eugene Chamber of Commerce.

[citation needed] While Piercy was mayor, a local income tax to fund schools was proposed, but defeated.

Piercy said that the measure was likely to be divisive: "If there's one thing the flag stands for, it's that people don't have to be compelled to say the Pledge of Allegiance or anything else.