"The state of emergency announced on July 4 and extended on July 31 ends today, October 2," Beji Caid Essebsi's office said.
"It had been extended for two months and this period ends" at midnight, presidency spokesman Moez Sinaoui told AFP, without elaborating.
On July 4, eight days after the shooting spree at the Mediterranean resort of Port El Kantaoui north of Sousse, Essebsi ordered a state of emergency for an initial 30 days.
The state of emergency was one of a raft of measures introduced by the authorities after the seaside massacre, which dealt a heavy blow to Tunisia's key tourism industry.
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The June 26 attack killed 30 Britons, three Irish, two Germans, one Belgian, one Portuguese and a Russian.
Afterwards, the government began arming tourism police for the first time and reinforced them with troops in an attempt to reassure foreign governments.
A state of emergency, granting special powers to the police and army, was in force for three years up until March 2014, following longtime secular president Zine El Abidine Ben Ali's ouster in a 2011 revolution.