Uttwil is; 210 children or 12.3% of the population are between 0 and 9 years old and 199 teenagers or 11.6% are between 10 and 19. Of the adult population, 165 people or 9.6% of the population are between 20 and 29 years old. 227 people or 13.3% are between 30 and 39, 308 people or 18.0% are between 40 and 49, and 244 people or 14.3% are between 50 and 59. The senior population distribution is 191 people or 11.2% of the population are between 60 and 69 years old, 100 people or 5.8% are between 70 and 79, there are 58 people or 3.4% who are between 80 and 89, and there are 9 people or 0.5% who are 90 and older. , there were 594 private households in the municipality, and an average of 2.4 persons per household. there were 250 single family homes (or 75.1% of the total) out of a total of 333 inhabited buildings. There were 33 two family buildings (9.9%), 12 three family buildings (3.6%) and 38 multi-family buildings (or 11.4%). There were 354 (or 24.6%) persons who were part of a couple without children, and 787 (or 54.7%) who were part of a couple with children. There were 70 (or 4.9%) people who lived in single parent home, while there are 6 persons who were adult children living with one or both parents, 4 persons who lived in a household made up of relatives, 8 who lived in a household made up of unrelated persons, and 16 who are either institutionalized or live in another type of collective housing. The vacancy rate for the municipality, , was 1.2%. , the construction rate of new housing units was 11.2 new units per 1000 residents. there were 669 apartments in the municipality. The most common apartment size was the 4 room apartment of which there were 208. There were 15 single room apartments and 109 apartments with six or more rooms. the average price to rent an average apartment in Uttwil was 1117.55 Swiss francs (CHF) per month (US$890, £500, €720 approx. exchange rate from 2000). The average rate for a one-room apartment was 496.67 CHF (US$400, £220, €320), a two-room apartment was about 636.43 CHF (US$510, £290, €410), a three-room apartment was about 891.42 CHF (US$710, £400, €570) and a six or more room apartment cost an average of 1490.00 CHF (US$1190, £670,