Tahmasp

Tahmasp or Tahmasb may refer to:


 * Tahmasb (character), a character in the Shahnameh
 * Tahmasp I (reigned 1524–1576), Safavid shah of Persia
 * Shahnameh of Shah Tahmasp, illustrated manuscript of the Shahnameh
 * Tahmasp II (reigned 1729–1732), Safavid shah of Persia
 * Tahmasp's campaign of 1731, into the Caucasus
 * Tahmasp Khan Jalayer, a general of Nader Shah
 * Tahmasb Mazaheri, Iranian politician and economist
 * Tahmasb Quli, various people so named, including Nader Shah