Yes, Saltillo terracotta can be used indoors. Saltillo terracotta tiles are known for their rustic appearance and warmth, making them a popular choice for indoor use in homes and commercial spaces. They can be used in various areas such as kitchens, living rooms, bathrooms, and entryways. However, it is important to note that proper installation and maintenance are crucial to ensure the longevity and durability of the tiles indoors.