The police-involved shooting happened at 195 South 6th Street just after 11:30 p.m.
The officer said he was approached by two armed men who intended to rob him, and he shot them.
The identities of the two men have not yet been released.
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The officer was taken to University Medical Center to be treated for trauma.
A weapon was recovered at scene.
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The shooting being investigated by the Essex County Prosecutor's Office.
The Jersey City Police Department released a statement:
"We are thankful that our detective, who was a victim of an attempted armed robbery, is OK and want to thank the Newark Police Department and the Essex County Prosecutor for their assistance in this ongoing investigation."