Dietlikon has a population (as of ) of . , 21.8% of the population was made up of foreign nationals. Over the last 10 years the population has grown at a rate of 18%. Most of the population () speaks German (83.7%), with Italian being second most common ( 5.2%) and Serbo-Croatian being third ( 2.0%). In the 2007 election the most popular party was the
SVP which received 36.4% of the vote. The next three most popular parties were the
SPS (20.8%), the
FDP (13.8%) and the
CSP (9.7%). The age distribution of the population () is children and teenagers (0–19 years old) make up 20.5% of the population, while adults (20–64 years old) make up 65.3% and seniors (over 64 years old) make up 14.2%. In Dietlikon about 75.9% of the population (between age 25-64) have completed either non-mandatory
upper secondary education or additional higher education (either university or a
Fachhochschule). Dietlikon has an unemployment rate of 3.09%. , there were 27 people employed in the
primary economic sector and about 8 businesses involved in this sector. 1379 people are employed in the
secondary sector and there are 73 businesses in this sector. 4278 people are employed in the
tertiary sector, with 303 businesses in this sector. The historical population is given in the following table: == Transportation ==