[3] Oetwil an der Limmat has an area of 2.8 km2 (1.1 sq mi).

Of the rest of the land, 20.6% is settled (buildings or roads) and the remainder (4%) is non-productive (rivers, glaciers or mountains).

As of 2007[update] 19% of the total municipal area was undergoing some type of construction.

[5] The municipality is located on the right side of the Limmattal on the border with the Canton of Aargau.

Most of the population (as of 2000[update]) speaks German (91.5%), with French being second most common (1.9%) and Italian being third (1.4%).

In Oetwil an der Limmat about 84.6% of the population (between age 25-64) have completed either non-mandatory upper secondary education or additional higher education (either university or a Fachhochschule).