Ayer is a village in the district of Sierre in the Swiss canton of Valais.

[2] The blazon of the village coat of arms is Gules tripant on Coupeaux Vert an Ibex Argent in chief four Mullets of Five of the last in cross.

[3] Most of the population (as of 2000[update]) speaks French (513 or 90.0%) as their first language, German is the second most common (27 or 4.7%) and Serbo-Croatian is the third (9 or 1.6%).

[5] The historical population is given in the following chart:[2][6] In the 2007 federal election the most popular party was the CVP which received 51.77% of the vote.

In the tertiary sector; 16 or 12.8% were in the sale or repair of motor vehicles, 26 or 20.8% were in the movement and storage of goods, 59 or 47.2% were in a hotel or restaurant, 6 or 4.8% were technical professionals or scientists, .

[9] From the 2000 census[update], 444 or 77.9% were Roman Catholic, while 38 or 6.7% belonged to the Swiss Reformed Church.