Police did not intervene in the protests in the capital of Muscat Friday and demonstrators remained peaceful, RIA Novosti reported Saturday.
Another rally was scheduled for Sunday in Morocco.
Unlike protests in Egypt, Yemen, Libya, Tunisia and Bahrain, the Oman demonstrations have so far been peaceful.
Demonstrators carried signs with slogans of support for Oman's Sultan Qaboos, but asked for reforms, including lower prices and better pay.
Senate Democrats to pull all-nighter on climate change
Interpol investigating stolen passports on missing flight