Medical staff recommended the president, aged 74, isolate for five days.
Algerian President Abdelmadjid Tebboune went into self-isolation on Saturday after "several" senior presidential and government officials showed symptoms of Covid-19, the presidency said.
Medical staff recommended the president, aged 74, isolate for five days, a statement read.
Algeria has officially recorded 55,630 novel coronavirus cases and 1,897 deaths since the start of its outbreak.
After a gradual reduction in the number of cases in past weeks, Algeria has seen a recent resurge.
Algerians vote on November 1 in a referendum on constitutional reforms, a flagship initiative of Tebboune.