Maricopa County Sheriff Joe Arpaio has raised more than $1 million this year in his bid for a sixth term.

The Republican remains far ahead of his opponents in fundraising and has $4.1 million on hand when his earlier contributions are factored in.

Democrat Paul Penzone's campaign says it has raised $148,000 this year.

Independent Mike Stauffer's campaign estimated that Stauffer had $38,000 and says much of the much was provided by Stauffer himself.

A call to Democrat John Rowan's campaign wasn't immediately returned Thursday afternoon.

Arpaio received numerous donations from people living outside of the state.

Nearly all of Penzone's contributions were made by Arizonans.

Arpaio was the only candidate to file a campaign report as of mid-afternoon Thursday.

Other candidates face a Monday deadline for reporting their fundraising.