Clontarf is a suburb of the Moreton Bay Region, Queensland, Australia. It is in the south-west of the Redcliffe peninsula, approximately 29 kilometres (18 mi) north-northeast of Brisbane, the state capital. It was named after Clontarf in Ireland.

The land use is a mix of residential and light industrial.

Clontarf is connected to Brisbane City, across Bramble Bay, by the Houghton Highway which is a 2.7 km long causeway that provides access to the southern tip of Redcliffe City, greatly decreasing the travel time between Redcliffe and Brisbane. The current pair of bridges, Houghton Highway and its twin Ted Smout Memorial Bridge, replaced the original Hornibrook Bridge which is now closed and mostly demolished.

Clontarf Beach and Bells Beach are two of the closest beaches to Brisbane City.

Pelican Park is known for its kite flying conditions, and a local industry has built around the sport. On weekends, many kites can be seen flying above Clontarf from the Hornibrook Bridge. During May, the Redcliffe Kite Club, based in Clontarf holds a two-day kite event called Kitefest.

In the 2011 census, Clontarf recorded a population of 7,911 people, 50.2% female and 49.8% male.

The median age of the Clontarf population was 42 years, 5 years above the national median of 37.

76.2% of people living in Clontarf were born in Australia. The other top responses for country of birth were New Zealand 5.5%, England 5.2%, Scotland 0.8%, Philippines 0.8%, South Africa 0.5%.

90.7% of people spoke only English at home; the next most common languages were 0.4% Tagalog, 0.4% German, 0.3% Dutch, 0.3% Italian, 0.3% Samoan.

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