Uznach has a population (as of ) of . , about 26.2% of the population was made up of foreign nationals. Of the foreign population, (), 58 are from
Germany, 275 are from
Italy, 642 are from ex-
Yugoslavia, 12 are from
Austria, 116 are from
Turkey, and 305 are from another country. Over the last 10 years the population has grown at a rate of 5.2%. Most of the population () speaks German (83.6%), with Albanian being second most common ( 3.8%) and Italian being third ( 3.3%). Of the Swiss national languages (), 4,486 speak
German, 14 people speak
French, 176 people speak
Italian, and 22 people speak
Romansh. there were 532 persons (or 9.9% of the population) who were living alone in a private dwelling. There were 1,078 (or 20.1%) persons who were part of a couple (married or otherwise committed) without children, and 3,240 (or 60.3%) who were part of a couple with children. There were 220 (or 4.1%) people who lived in single parent home, while there are 26 persons who were adult children living with one or both parents, 27 persons who lived in a household made up of relatives, 33 who lived household made up of unrelated persons, and 213 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 37.6% of the vote. The next three most popular parties were the
CVP (24.4%), the
SP (12.5%) and the
FDP (10.7%). In Uznach about 62.6% of the population (between age 25–64) have completed either non-mandatory
upper secondary education or additional higher education (either university or a
Fachhochschule). Out of the total population in Uznach, , the highest education level completed by 1,184 people (22.1% of the population) was
Primary, while 1,773 (33.0%) have completed their secondary education, 483 (9.0%) have attended a
Tertiary school, and 334 (6.2%) are not in school. The remainder did not answer this question. ==Economy==