The city has a huge choice of supermarkets catering to all budgets (although of course the local markets can't be beaten for cheap, excellent quality fresh fruit and veg). All sell local and imported goods and stock baby/children's products. We've only listed the ones we have visited.
A visit to one of the nine Rimping Supermarkets is usually a relaxing experience. There is classical music to listen to as you go about doing your shopping and it is never overwhelmingly busy. The supermarket chain stocks a wide range of both local and imported fruit, vegetables, fish, meat and foods. Each branch has an instore bakery which offers a variety of fresh bread and pastries daily. We'd say that their bread is one of the best in the city. A few of the branches also have instore restaurants. We haven't been to all of the branches, but the ones we do use are all very nice.
Central Festival Food Hall
Central Festival Food Hall sits alongside Rimping in terms of what it offers its customers - high quality local and imported foods. In addition, there is a bakery, a salad bar and also a section selling delicious-looking, fresh, ready made food to take home. After visiting quite a few of the supermarkets around the city, we've decided that the fish and cheese counters here are the best in terms of variety and value. Baby changing facilities available opposite the supermarket, within the mall itself.
Located on the ground floor of Central Airport Plaza, this supermarket isn't as large as Central Food Hall or some of the Rimping branches, but manages to pack in a fair amount of the weekly shopping list. It has an extensive fruit section, a small cheese, meat and fish counter and a small bakery. Baby changing facilities within Central Airport Plaza.
Big C Extra
This is more like a hypermarket, on the scale of a Tesco Extra. In addition to food products it stocks kitchen gadgets, electronics, furniture, outdoor equipment (bikes, tents, sports equipment), clothes and shoes, dvds, toys and stationery. The baby/children's section stocks local brands and is pretty comprehensive. Compared to the three supermarkets listed above, Big C is busy, although you only notice this once you get to the tills. No baby changing facilities available.
The branch on the highway shares a building with Homepro, a DIY store similar to B&Q.
This is similar to Big C and the Tesco Extras in England in the way it stocks more than just food.
This hypermarket/cash and carry requires a member card in order to make any purchases. Its main customer base is local restaurants and small businesses including offices, corner shops and foodstalls so many items are sold in bulk although you can also buy items individually. It stocks a variety of local and imported foods, has a large fish, veg and meat section. It also stocks electricals and household goods. We bought our washing machine, a floor fan and aircon (which they delivered and fitted for us) from here, but overall we don't tend to do much food shopping here as we find the other alternatives work better for us. Queues at the till can be long as people buy vast amounts.
Some Additional information
Most supermarkets around Chiang Mai are open daily from about 9 or 10am onwards.
You cannot buy alcohol in Thailand between the hours of midnight - 11AM & 2pm - 5pm.