The protest was meant to show officials in Washington that Arpaio shouldn't handle immigration enforcement, and Congress and the Obama administration need to come up with a way for immigrant workers to come to the country legally, protesters said.
Officers used pepper spray as protesters hurled water bottles at police.
For his part, Arpaio said he wasn't bothered by protesters and that they should be directing their frustrations at Congress because it has the power to change America's immigration laws. "They are zeroing in on the wrong guy," Arpaio said. "They ought to be zeroing in on the president."