Two-thirds of that money would go toward hiring 120 more police officers, and the rest to help the city exit from bankruptcy.
The city council, the mayor, and the business community have endorsed the measure, but the San Joaquin County Taxpayer's Association opposes it.
Stockton resident, Gene Hardin, felt it was important to cast his vote today.
"This particular tax vote is very important whichever side of the fence you land on," Hardin said. "I just think it's important to get out and vote."
Austin Erdman, from the San Joaquin County Registrar of Voters, said most voters are sitting this one out with less than 25 percent expected to cast their ballot.
"Based on the, so far, the indicator of turnout, based on the absentee, it's going to be a quick night," Erdman said.
Measure B is also on the ballot, and is an advisory calling for a public voice on how that money would be spent.