Sulgen has a population () of . , 21.5% of the population are foreign nationals. Over the last 10 years (1997–2007) the population has changed at a rate of 2.2%. Most of the population () speaks
German (88.3%), with
Albanian being second most common ( 5.6%) and
Italian being third (1.7%). , the gender distribution of the population was 49.3% male and 50.7% female. The population was made up of 1,310 Swiss men (38.4% of the population), and 373 (10.9%) non-Swiss men. There were 1,369 Swiss women (40.1%), and 359 (10.5%) non-Swiss women. , there were 1,273 private households in the municipality, and an average of 2.6 persons per household. There were 705 (or 20.6%) persons who were part of a couple without children, and 2,030 (or 59.3%) who were part of a couple with children. There were 179 (or 5.2%) people who lived in single parent home, while there are 21 persons who were adult children living with one or both parents, 10 persons who lived in a household made up of relatives, 32 who lived in a household made up of unrelated persons, and 82 who are either institutionalized or live in another type of collective housing. The vacancy rate for the municipality, , was 1.29%. , the construction rate of new housing units was 1.2 new units per 1000 residents. the average price to rent an average apartment in Sulgen was 933.73
Swiss francs (CHF) per month (US$750, £420, €600 approx. exchange rate from 2000). The average rate for a one-room apartment was 513.13 CHF (US$410, £230, €330), a two-room apartment was about 664.98 CHF (US$530, £300, €430), a three-room apartment was about 771.34 CHF (US$620, £350, €490) and a six or more room apartment cost an average of 1486.21 CHF (US$1190, £670, €950). The average apartment price in Sulgen was 83.7% of the national average of 1116 CHF. In the
2007 federal election the most popular party was the
SVP which received 39.47% of the vote. The next three most popular parties were the
FDP (15.55%), the
CVP (14.47%) and the
SP (11.39%). In the federal election, a total of 1,094 votes were cast, and the
voter turnout was 51.1%. The historical population is given in the following table: ==Economy==