Pratval had a population (as of 2013) of 254. , 4.7% of the population was made up of foreign nationals. Over the last 10 years the population has decreased at a rate of -5.6%. The age distribution, , in Pratval is; 41 people or 17.1% of the population are between 0 and 9 years old. 17 people or 7.1% are 10 to 14, and 14 people or 5.8% are 15 to 19. Of the adult population, 17 people or 7.1% of the population are between 20 and 29 years old. 51 people or 21.3% are 30 to 39, 48 people or 20.0% are 40 to 49, and 15 people or 6.3% are 50 to 59. The senior population distribution is 16 people or 6.7% of the population are between 60 and 69 years old, 13 people or 5.4% are 70 to 79, there are 8 people or 3.3% who are 80 to 89. In the
2007 federal election the most popular party was the
SPS which received 41.9% of the vote. The next three most popular parties were the
SVP (27.6%), the
FDP (16.8%) and the
CVP (6.9%). ==Languages==