The first documented evidence of "Ehingas" appears in 773 in a deed of donation from the Freising Bishop.

After the administrative reform of 1978 Günzenhausen, Ottenburg and Deutenhausen were brought into the municipality Eching.

The establishment of the business park Eching, which was founded together with the neighboring municipality Neufahrn bei Freising and the link to the Munich International Airport via the Munich S-Bahn developed Eching into a modern suburban municipality.

The coat of arms of Eching shows the Freising blackamoor and heath blossoms flanking St. Andrew's Cross.

Between Eching and Hollern are several other gravel quarry lakes for bathing, all which are planned to be developed into a recreational area close to town.