The village takes its name, Krokio, from the native plant crocus. A bulbous plant of the iris family, whose dried flower stamens are sold as a yellow or reddish-brown substance called “saffron,” meaning “crocus,” suitable for dyeing, coloring, and perfumery.

It is reported that in the broader area where Krokio is built today, Philip, King of Macedonia, in the spring of 352 B.C., confronted Onomarchos, the “commander-in-chief” of the Phocians, between the Pagasetic Gulf coast and the cities of Thebes and Alos. This location was suitable for the full deployment of the Thessalian cavalry, which was six times larger than Onomarchos’ cavalry. History records that Philip’s 3,000 horsemen defeated the Phocian army in the battle at Krokio, killing 6,000 soldiers and Onomarchos himself, while 3,000 were captured and executed by drowning in the sea as sacrilegious offenders.

In the past, Krokio was called Kourfali. It was renamed Krokio in 1919 by Government Gazette decision 35/1919. The first seal of the Community depicted the goddess Athena, with the words “KOINOTIS KOURFALIOU” on the outside and “ACHAEANS” on the inside.

After 1800, Krokio was a fief of Ali Pasha. In 1840, 17 families from the settlement of Karaman settled there, followed later by 9 families from the settlement of Karabasi. Until 1881, Krokio was inhabited by Koniar Turks, who, after the annexation, sold their small properties and returned to Iconium in Asia, from where they originated. Until November 1905, Krokio remained the fief of the Turkish Agha Karaman Bilik, following the seizure of Ali Pasha’s estates by the Turkish state. He sold 3,000 stremmas to Stergios Velanis, a resident of Kofon, and 10,000 stremmas to Petros Mitsopoulos, a resident of Krokio.

In 1929, the Mitsopoulos estates were expropriated, and plots of 30–150 stremmas were allocated to each family, with their value paid by the state. Until 1912, Krokio belonged to the Municipality of Almyros, and from 1919 it had its own Community, with Georgios Makatsianos as its first President. From 1998 to 2010, under the Kapodistrias law, Krokio was a Municipal District of the Municipality of Almyros. Today, under the Kallikratis law, it is a Local Community of the Municipality of Almyros, with approximately 500 inhabitants.

East of Krokio, next to the Nea Anchialos Airport, lies the settlement of Korfalaki (part of Krokio), a name derived from the old “Kourfali.” According to the 2001 census, the Local Community of Krokio had approximately 850 inhabitants.