Title: List of countries by length of coastline
Content:  Note: non-sovereign areas in italic.
Title: List of countries by length of coastline
Content:  This article contains a list of countries by length of coastline, in kilometers. A coastline of zero indicates that the country is landlocked.
Title: Arabian Sea
Content: 1) 🇮🇳 - 2,500 km coastline ; 2) 🇵🇰 - 1,050 km coastline Border and Basin countries:
Title: List of U.S. states and territories by coastline
Content: New York has both ocean and Great Lakes coastline.  This is a list of U.S. states and territories ranked by their coastline length. 30 states have a coastline: 23 with a coastline on the Arctic Ocean, Atlantic Ocean (including the Gulf of Mexico and Gulf of Maine), and/or Pacific Ocean, and eight with a Great Lakes shoreline. New York has coasts on both the Great Lakes and the Atlantic Ocean. Smaller border lakes such as Lake Champlain or Lake of the Woods do not count. All of the five major U.S. territories have coastlines — three of them have a coastline on the Pacific Ocean, and two of them have a coastline on the Atlantic 
Title: List of countries by length of coastline
Content:  territories, are included in the coastline estimate for that country (e.g., Canary Islands are included in Spain). Coastline length for overseas territories and dependencies are listed separately. Disputed areas are not included in country or regional totals." The coastline paradox states that a coastline does not have a well-defined length. Measurements of the length of a coastline behave like a fractal, being different at different scale intervals (distance between points on the coastline at which measurements are taken). The smaller the scale interval (meaning the more detailed the measurement), the longer the coastline will be. This "magnifying" effect is greater for convoluted coastlines than for relatively smooth ones. 
Title: Coastline of the United Kingdom
Content:  The United Kingdom's coastline is more broken than coastlines of many other countries. It has a fractal or Hausdorff dimension or 'wiggliness' of 1.25, which is comparatively high; the Australian coastline for example has a fractal dimension of 1.13, and that of South Africa is 1.02. As a result of this shape and the number of islands, the coastline of the UK is longer than that of similar sized countries. This means the UK has a relatively high coast/area ratio. Nowhere in the UK is more than 113 km from the coast. It is estimated that around 3 million people (out of 60 million) live on the coast of the UK. The place furthest from the coast is Coton in the Elms in Derbyshire, which is equidistant from Fosdyke Wash in Lincolnshire; White Sands between Neston in Cheshire and Flint, Flintshire in Wales; and Westbury-on-Severn Gloucestershire.
Title: Coastline of Australia
Content:   The coastline of Australia comprises the coasts of mainland Australia and Tasmania. It nominally includes a part of all Australian states and territories; the otherwise landlocked Australian Capital Territory has a coastal enclave at Jervis Bay Territory. According to The World Factbook, Australia has the sixth longest coastline in the world, at 25,780 km. Due to the historical context of European discovery and exploration, the coastline has been the first point of contact over 400 years. In the IBRA bioregionalisation, the coast has 36 coastal bioregions that define the whole coast and there is the more complex Integrated Marine and Coastal Regionalisation of Australia, which includes ecological features that are beyond the shoreline.
Title: List of countries by length of coastline
Content: Data marked The World Factbook or TWF covers 198 countries and 55 territories, from the book published by the Central Intelligence Agency. In addition to coastline lengths, this is the source of the land area used to calculate the "coast/area ratio" for both TWF and WRI (see below) coastline measurement. This ratio measures how many metres of coastline correspond to every square kilometer of land area. The ratio illustrates the ease of accessibility to the country's coast from every point in its interior. Therefore, an island country like Maldives, or a country carved by the sea like Greece, is more likely to have a high ratio, while a landlocked 
Title: Persian Gulf
Content:  Countries by coastline length:
Title: Coastline of New Zealand
Content:   New Zealand has 15,000 km of coastline making it the 9th longest in the world. The coastline borders the Tasman Sea and the Pacific Ocean. The northern and southernmost points of the coastline on the two main islands are Surville Cliffs and Slope Point respectively. Cape Reinga in the north and Bluff in the south are often incorrectly given as the extremities of the coastline on the North and South Islands. Coastal development, such as buildings and marine farms, has become contentious in recent decades.

Question: which country has the most coastline in the world?
Answer: Canada.