It said two security officers were hurt "as a result of the failed bombing" on July 4, the day when Americans celebrate their independence.
Security officers sealed off the area after "a person blew himself up in a car in front of the US consulate in Jeddah," the report said.
There was no immediate word on who was responsible, but since late 2014 Saudi Arabian security officers and minority Shiites have been hit by deadly violence claimed by the Islamic State group.
American embassy officers could not be reached immediately, but the Saudi interior ministry said it would issue a statement.
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In March last year the US embassy closed its main office, as well as consulates in Jeddah and Dhahran, for a few days over unspecified "security concerns".
In May this year, the interior ministry said four suspected jihadists died -- two by blowing themselves up -- during a raid in the kingdom's west.
One of the suspects was sought in connection with the suicide bombing of a mosque inside a Saudi special forces compound in the southwestern city of Abha last August. Fifteen people died.
Another suspect killed in the May raid was wanted over suicide bombings at Shiite mosques that killed 25 people in May and June last year in the kingdom's east.
Police said he was also involved in the November 2014 shooting of seven Shiite worshippers, which began the series of attacks allegedly linked to IS in the Sunni-dominated kingdom.
Abu Bakr al-Baghdadi, leader of the IS jihadists which has seized territory in Iraq and Syria, has reputedly called Saudi Arabia's Sunni rulers "apostate tyrants" and called on Saudis to rise against them.