There were several Iranian empires and at least two were called "Persian" these were the Achamenid (550-330 BC) and the Sassanid (226-651 AD).
In the former, the boundaries shifted over the course of the two hundred years that the Achaemenid Kings were in control. Egypt revolted several times and some territories that were once under control, such as Khwarazm (modern Uzbekistan) gained their independance. Much of the Caucasus also gained its independance by the time of the late Achamenids, as did the Indian and European satrapies.
At its greatest extent, it spanned from northern Greece, including the modern states of Macedonia, Bulgaria, Turkey, Syria, Lebanon, Israel and Palestine, Jordan, Turkey, Armenia, Georgia, Abkhazia (de-facto independent) Chechnya and Ossetia regions, Azarbaijan, Iran, Iraq, Kuwait, Egypt, parts of Lybia and Sudan, Turkmenistan, Uzbekistan, parts of Kazakhstan, Tajikistan, Afghanistan, Pakistan and parts of Kyrghystan.
This was at the time of Dariush the Great but as mentioned above, some areas passed away from control.
In Sassanian times, the same happened and at its greatest extent, the Persian empire of the Sassanids included Iran, most of Afghanistan, Turkmenistan, the Balutchistan and Sind regions of Pakistan, Kuwait, Iraq, Armenia, Georgia (independent state but vassal to Persia), Chechnya/Ingushia, Daghestan region of Russia, Bahrein, Oman, Yemen, United Arab Emirates and eastern Turkey (Kurdistant region).
Temporary conquests included the rest of Turkey, Syria, Palestine/Israel/Jordan/Lebanon, Egypt, much of Arabia.
None - the Persian empre stretched from Libya to Central Asia which covers many modern countries, none of which is 'most' of that vast area.
They stretch from Libya and Egypt through the Middle East and Central Asia to Pakistan. The names of modern countries that were once part of the Persian Empire are: Afghanistan, Azerbaijan, Bahrain, Iraq, Iran, Pakistan, Tajikistan, Uzbekistan, Lebanon, Israel, Syria, Turkey, Egypt, Libya, part of northern Greece.
Libya, Egypt, Israel, Lebanon, Syria, Turkey, Iraq, Iran, Afghanistan, Pakistan and parts of the central Asian countries.
The Persian Empire took in Part of: Afghanistan, Arabia, Bulgaria, Greece, India, Pakistan, Russia, and Ukraine. The Persian Empire took in all of: Armenia, Azerbaijan, Georgia, Iraq, Iran, Israel, Jordan, Lebanon, Pakistan, Syria, Turkey, Egypt, Libya.
Libya, Egypt, Isreal, Lebanon, Syria, Turkey, Iraq, Iran, Afghanistan, Pakistan, parts of southern states of Central Asia.
None - the Persian empre stretched from Libya to Central Asia which covers many modern countries, none of which is 'most' of that vast area.
They stretch from Libya and Egypt through the Middle East and Central Asia to Pakistan. The names of modern countries that were once part of the Persian Empire are: Afghanistan, Azerbaijan, Bahrain, Iraq, Iran, Pakistan, Tajikistan, Uzbekistan, Lebanon, Israel, Syria, Turkey, Egypt, Libya, part of northern Greece.
Libya, Egypt, Israel, Lebanon, Syria, Turkey, Iraq, Iran, Afghanistan, Pakistan and parts of the central Asian countries.
The Persian Empire took in Part of: Afghanistan, Arabia, Bulgaria, Greece, India, Pakistan, Russia, and Ukraine. The Persian Empire took in all of: Armenia, Azerbaijan, Georgia, Iraq, Iran, Israel, Jordan, Lebanon, Pakistan, Syria, Turkey, Egypt, Libya.
Libya, Egypt, Isreal, Lebanon, Syria, Turkey, Iraq, Iran, Afghanistan, Pakistan, parts of southern states of Central Asia.
Peru, Mexico, Ecuador, Bolivia and Chile.
Iran was the centre of the Persian empire.
The countries are: Egypt, Libya, Tunisia, Algeria, Sudan, and Somalia.
Iraq, Syria, Lebanon, Israel and parts of eastern Turkey.
ecuador peru columbia chile venezuala
The modern countries that include territories of the ancient Maya empire are Mexico, Guatemala, Belize, Honduras, and El Salvador. These countries were once home to the various city-states that made up the Maya civilization.
Usually when one says Persian it is automatically referenced to the country of Iran. Technically, Persia is associated with the Persian empire which once included the current countries of Greece, Turkey, Armenia Lebanon, Israel, Palestine, Syria, Jordan, Egypt, Pakistan, Afghanistan, Iraq, Kazakhstan, Macedonia, Bulgari, Azerbaijan (among many other countries) For this reason a lot of these countries are influenced by Persian culture.