Dauphin Island is home to Fort Gaines, Dauphin Island Sea Lab, The Estuarium public aquarium, the Dauphin Island Airport, boat ramps, a large public pier (that sits on dry land), historic sites, several restaurants, new condominium developments, and numerous private homes. Beaches attract tourism, and fishing is a popular activity in the waters around the island. The island is connected to the mainland by the Gordon Persons Bridge.
Although the island has several bird sanctuaries, the main one is the 164-acre (66 ha) Audubon Bird Sanctuary. Dauphin Island is the first landfall encountered by many birds as they migrate north from South America, and as a consequence many species can be found resting there before continuing their journey.