"This means the community won't be as afraid to go with their friends, go out to the store," said Nicole Torres, who was participating at church vigil outside Phoenix after the ruling. "They hopefully will still feel safe enough to call the police now that they will no longer require you know checking of documentation."
Rosario Peralta, a legal immigrant who runs a south Phoenix grocery store, said some of the frightened families that had planned to move out of the state appear to be rethinking their decisions.
"I was worried about my customers..business was slow, but it's going to get better," she said.
The Arizona immigration law, which passed in late April, has attracted international attention and sparked protests around the country. It faces legal challenges in six lawsuits, in addition to the one filed by DOJ.
Sixty percent of Americans support the Arizona law, according to the most recent ABC News/Washington Post poll. But fewer -- 46 percent -- think the states should have power to make and enforce their own immigration laws, one criticism of the Arizona statute.
ABC News' Lauren Pearle, Jessica Hopper and Barbara Pinto contributed to this report.