In 1775, after the liquidation of Zaporozhian Sich, the Cossacks, leaving the Cossack winter quarters, settled in the slobodas, turning into peasants.
One of these slobodas was located in the modern city of Pomichna. The fortress of St. Elizabeth (in modern-day Kropyvnytskyi) was garrisoned by Zaporozhian Cossacks, and the village of Pomichna provided the garrison with food, thereby providing help (поміч, pomich), hence the name of the settlement "Pomichna".
During World War II, the settlement was occupied by German troops. On March 18, 1944, Pomichna was liberated from the Nazi occupiers by the troops of the 2nd Ukrainian Front.
Until 18 July 2020, Pomichna belonged to Dobrovelychkivka Raion. The raion was abolished in July 2020, as part of the administrative reform of Ukraine, which reduced the number of raions of Kirovohrad Oblast to four. The area of Dobrovelychkivka Raion was merged into Novoukrainka Raion.[6][7]