Different dog breeds have difference average levels of intelligence. But while human groups have one or another average IQ in dogs it’s harder to measure intelligence directly without physical games so motivation to follow orders may play a role too. It would be like if you could only measure IQ in humans by having people walk around while solving various puzzles in a room on command.
A few researchers have tried to rank dog breeds based on intelligence, but this is a new research area and we need much more research on this area to get a conclusive list with concrete IQ scores.
Stanley Coren created a breed intelligence rank list and I used it to make a list with dog images. All images are from the various Wikipedia articles.
Here is the intelligence rank list: