Widnau has a population (as of ) of . , about 25.0% of the population was made up of foreign nationals. Of the foreign population, (), 153 are from
Germany, 205 are from
Italy, 685 are from ex-
Yugoslavia, 246 are from
Austria, 165 are from
Turkey, and 322 are from another country. Over the last 10 years the population has grown at a rate of 12.9%. Most of the population () speaks German (88.0%), with Albanian being second most common ( 2.8%) and Serbo-Croatian being third ( 1.7%). Of the Swiss national languages (), 6,574 speak
German, 22 people speak
French, 117 people speak
Italian, and 8 people speak
Romansh. there were 809 persons (or 10.8% of the population) who were living alone in a private dwelling. There were 1,637 (or 21.9%) persons who were part of a couple (married or otherwise committed) without children, and 4,299 (or 57.6%) who were part of a couple with children. There were 461 (or 6.2%) people who lived in single parent home, while there are 55 persons who were adult children living with one or both parents, 40 persons who lived in a household made up of relatives, 58 who lived household made up of unrelated persons, and 111 who are either institutionalized or live in another type of collective housing. In the
2007 federal election the most popular party was the
SVP which received 42.9% of the vote. The next three most popular parties were the
CVP (24.9%), the
FDP (11.5%) and the
SP (9.9%). In Widnau about 70.4% of the population (between age 25–64) have completed either non-mandatory
upper secondary education or additional higher education (either university or a
Fachhochschule). Out of the total population in Widnau, , the highest education level completed by 1,528 people (20.5% of the population) was
Primary, while 2,736 (36.6%) have completed their secondary education, 786 (10.5%) have attended a
Tertiary school, and 314 (4.2%) are not in school. The remainder did not answer this question. ==Economy==