Goldach is first mentioned in 789 as Goldaha, though this comes from a later copy of the original document. In 847 it was mentioned as Coldaun.
Geography
Goldach has an area,, of. Of this area, 33.1% is used for agricultural purposes, while 12.7% is forested. Of the rest of the land, 51.9% is settled and the remainder is non-productive. The municipality is located in the Rorschach Wahlkreis. It is located on the road between Rorschach and St. Gallen and stretches from Lake Constance to the Rorschacherberg. It consists of the village sections of Ober-Goldach, Unter-Goldach and Riet.
Goldach has a population of. , about 20.6% of the population was made up of foreign nationals. Of the foreign population,, 128 are from Germany, 625 are from Italy, 481 are from ex-Yugoslavia, 129 are from Austria, 69 are from Turkey, and 218 are from another country. Over the last 10 years the population has grown at a rate of 8.5%. Most of the population speaks German, with Italian being second most common and Serbo-Croatian being third. Of the Swiss national languages, 7,552 speak German, 19 people speak French, 337 people speak Italian, and 12 people speak Romansh. The age distribution,, in Goldach is; 935 children or 11.1% of the population are between 0 and 9 years old and 1,029 teenagers or 12.2% are between 10 and 19. Of the adult population, 951 people or 11.3% of the population are between 20 and 29 years old. 1,395 people or 16.5% are between 30 and 39, 1,178 people or 14.0% are between 40 and 49, and 1,098 people or 13.0% are between 50 and 59. The senior population distribution is 862 people or 10.2% of the population are between 60 and 69 years old, 657 people or 7.8% are between 70 and 79, there are 289 people or 3.4% who are between 80 and 89, and there are 46 people or 0.5% who are between 90 and 99, and 1 person who is 100 or more. there were 1,176 persons who were living alone in a private dwelling. There were 2,169 persons who were part of a couple without children, and 4,446 who were part of a couple with children. There were 390 people who lived in single parent home, while there are 49 persons who were adult children living with one or both parents, 40 persons who lived in a household made up of relatives, 59 who lived household made up of unrelated persons, and 112 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 36.1% of the vote. The next three most popular parties were the CVP, the SP and the FDP. The entire Swiss population is generally well educated. In Goldach about 73.8% of the population have completed either non-mandatory upper secondary education or additional higher education. Out of the total population in Goldach,, the highest education level completed by 1,939 people was Primary, while 3,516 have completed Secondary, 939 have attended a Tertiary school, and 291 are not in school. The remainder did not answer this question. The historical population is given in the following table:
year
population
1850
785
1880
1,388
1900
2,278
1910
4,007
1950
3,849
1960
6,233
2000
8,441
Economy
, Goldach had an unemployment rate of 1.98%. , there were 65 people employed in the primary economic sector and about 12 businesses involved in this sector. 2,200 people are employed in the secondary sector and there are 92 businesses in this sector. 1,613 people are employed in the tertiary sector, with 247 businesses in this sector. the average unemployment rate was 3.6%. There were 345 businesses in the municipality of which 91 were involved in the secondary sector of the economy while 245 were involved in the third. there were 1,169 residents who worked in the municipality, while 3,191 residents worked outside Goldach and 1,507 people commuted into the municipality for work.
Religion
From the, 4,729 or 56.0% are Roman Catholic, while 2,308 or 27.3% belonged to the Swiss Reformed Church. Of the rest of the population, there are 5 individuals who belong to the Christian Catholic faith, there are 229 individuals who belong to the Orthodox Church, and there are 215 individuals who belong to another Christian church. There are 306 who are Islamic. There are 25 individuals who belong to another church, 549 belong to no church, are agnostic or atheist, and 75 individuals did not answer the question.