[2] The city was previously named after Georgi Dimitrov, a prominent Bulgarian and Soviet communist politician, but was renamed in 2016 as a result of decommunization laws.

These two settlements were built in the early twentieth century on land leased from the rural communities of Novoekonomichne and Hrodivka villages.

On 21 March 2016, in accordance with the law on decommunization, Dimitrov's deputies chose a new name and voted to rename the city Myrnohrad.

[10] On 27 February 2023, during Russia's full-scale invasion of Ukraine, Russians launched a missile attack on the city, damaging a kindergarten.

[14] On 29 August, Russian forces reportedly entered the southern outskirts of Myrnohrad, although whether these were only reconnaissance groups or if actual soldiers were in the city was disputed.

[15] In wake of Russia's offensive towards Pokrovsk, in late 2024 and January of 2025, Myrnohrad saw a steady advancement of Russian forces on the town.