| 2nd to 4th centuries | Germersheim was a Roman military settlement, called "Vicus Julius". |
| 1090 | First documentary mention of the name Germersheim (in the Sinsheim chronicles). |
| 1276 | Germersheim received its town charter from Rudolf of Habsburg. |
| 1298 to 1527 | Germersheim was home to an "Ordo Servorum Mariae" monastery. |
| 14th to 18th centuries | At first, Germersheim was a bailiwick, but later became home to the local and regional administration. |
| 1674 | The town and the castle were destroyed by the troops of Marshal Turenne. |
| 1699 to 1793 | Germersheim was home to a Franciscan monastery. |
| 1793 to 1814 | The town was under French rule. |
| 1816 | Germersheim and the rest of the Palatinate were affiliated to Bavaria. |
| 1834 to 1861 | The Germersheim fortress was built. |
| Until 1918 | Germersheim was a fortress and garrison town. |
| 1921/22 | As a result of the Treaty of Versailles the fortress was dismanteled. |
| Until 1930 | French occupation troops were stationed in Germersheim. |
| 1936 to 1945 | Germersheim was a German garrison. |
| 1947 | The International and Interpretation Institute of the University of Mainz (today "FASK"- School of Applied Linguistics and Cultural Studies) was established. |
| 1951 | A car fleet was established. It later became the depot of Germany's Nato partner USA. |
| 1956 | Germersheim became a garrison of the Bundeswehr (the German army). |
| 1963 | Germerheim was twinned with Tournus in Burgundy. |
| 1968 | The 60 ha (about 150 acres) industrial and commercial harbour with a large industrial and commercial estate was built. |
| 1972 | The village of Sondernheim was suburbanised. |
| 1976 | The imperial town celebrated its 700th anniversary by inaugurating today's town and fortress museum. |
| 7th of June 1984 | The ground-breaking ceremony for the building of a Daimler-Benz central supply depot took place. |
| As
of the mid 1980s |
The old town has been renovated and the network of cycle paths expanded almost to completion. |
| November 1989 | The new event centre was completed and handed over. |
| December 1989 | The B9 ring road was completed. |
| October 1990 | The Rhineland-Palatinate road construction museum (today: German road construction museum) was inaugurated. |
| September 1991 | The Mercedes Benz AG central supply depot (today: DaimlerChrysler AG Global Logistics Center) was opened. |
| May 1992 | The "Königsplatz" (King's square), newly designed by artist Jürgen Goertz, was inaugurated. |
| Since 1994 | The Germersheim "Kultursommer" open-air festival in the erstwhile "Hufeisen"(horseshoe) fortress area has been taking place every year, in the course of the Rhineland-Palatinate "Kultursommer". |
| As
of the mid 1990s |
The "Wörth-West" industrial park, covering an area of approximately 40 ha (about 100 acres), has been undergoing developing. |
| 1997 | The School of Applied Linguistics and Cultural Studies of the Johannes-Gutenberg University of Mainz celebrated its 50th anniversary. |
| July 1998 | The new "Hufeisen" culture and youth centre in the erstwhile "Becker Front" fortress was inaugurated. |
| 2001 | Germersheim celebrated the 725th anniversary of receiving the town charter. The "Lamotte Front" municipal park was inaugurated, and many of the anniversary ceremonies took place throughout the year. | 2003 | Germersheim celebrated the 40th anniversary of its town twinning with Tournus in Burgundy. |