Inkwil has a population (as of ) of . , 4.0% of the population was made up of foreign nationals. Over the last 10 years the population has decreased at a rate of -2.4%. Most of the population () speaks German (98.0%), with Portuguese being second most common ( 0.5%) and Serbo-Croatian being third ( 0.5%). In the 2007 election the most popular party was the
SVP which received 36.8% of the vote. The next three most popular parties were the
SPS (29.8%), the
FDP (13.7%) and the
CSP (5.4%). The age distribution of the population () is children and teenagers (0–19 years old) make up 26.6% of the population, while adults (20–64 years old) make up 58.4% and seniors (over 64 years old) make up 15%. About 82.2% of the population (between age 25–64) have completed either non-mandatory
upper secondary education or additional higher education (either university or a
Fachhochschule). Inkwil has an unemployment rate of 1.64%. , there were 20 people employed in the
primary economic sector and about 8 businesses involved in this sector. 69 people are employed in the
secondary sector and there are 6 businesses in this sector. 20 people are employed in the
tertiary sector, with 10 businesses in this sector. The historical population is given in the following table: ==Heritage sites of national significance==