Zornheim borders in the southwest on Ebersheim, an outlying centre of the state capital of Mainz on the edge of the Frankfurt Rhine Main Region.

After the Lords of Bolanden had transferred sovereignty over Zornheim to one of the Counts of Hohenfels about 1220, the fiefholders then sold the village and the court of Zornheim to Saint Clare's Convent at Mainz (Mainzer Kloster Sankt Klara) after receiving Count of Hohenfels Hermann II's leave to do so.

In the sale document issued at Oppenheim on 9 June 1329, the selling price is named: 200 pounds of Hellers.

Thereafter, the abbess and the convent held not only extensive lands in the Zornheim municipal area, but rather also the immediate lordship over the village.

In 1887, a two-classroom school building with two teacher's dwellings was built, and in 1894 and 1895 arose the current parish church.

The highlight was formed by the dedication of the first wine learning path in the Mainz-Bingen district at the end of the “Dechenberg” apportionment process on 30 June 1979.

The last few decades of local history were characterized by development that saw the population figure rise from roughly 1,000 to more than 3,700.

For this, great efforts were required of the mayors Hans Steib (1960–1979), Richard Becker (1979–2003) and Dr. Werner Dahmen (2003-    ) and the councillors and administrations at their side.

Beginning in 1962, the new building areas of Niedernberg-Weidenweg, Südstraße, Kappel, Banggarten, Obere Pfortengewann and Elfmorgen were opened up and developed.

From 1962 to 1967, the whole village got sewerage, the water supply network was overhauled, all streets were paved with asphalt, a sewage treatment plant was built and a children's playground was laid out.

In 1966, Zornheim took part for the first time in the contest Unser Dorf soll schöner werden (“Our Village Should Become Lovelier”) and came away as district and regional winner.

In the same year, Zornheim was awarded a prize of honour in bronze for having advanced as far as the state competition in Unser Dorf soll schöner werden.

In October 1971, Zornheim was connected to the state capital Mainz's urban transport network and in December of the same year, a four-class kindergarten was dedicated.

In the course of administrative reform, Zornheim passed on New Year's Day 1973 to the newly formed Verbandsgemeinde of Nieder-Olm.

To ensure an even water pressure in the community's higher neighbourhoods, a pressure-increasing facility was brought into service in July 1975.

Between 1988 and 1990, the municipal streets were torn up many times to lay gas mains and broadband television cables.

[4] The council is made up of 21 council members, counting the part-time mayor, with seats apportioned thus: The municipality's arms might be described thus: Per fess barry of five argent and gules, and gules a wheel spoked of six couped at the upper edge of the hub of the first; half Wheel of Mainz.

Its Großlage (grouping in the German system of wine classification) comprises the vineyards Mönchbäumchen, Pilgerweg, Dachgewann, Guldenmorgen and Vogelsang.