In the U.S.A.
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Built? or flown? The first airplanes (I'm excluding balloons, kites and unmotorised gliders) were built as small models as early as 1848 in England and France.
However the first large scale aircraft were built in Russia, France, Germany, England, US etc. Pretty much all over the place. There was a lot of activity to develop a successful airplane and I'm not sure if anyone is actually recorded as being the first to build one. The patent offices have many hilarious patents on file for various "heavier than air" machines and most were spectacular failures.
The Wright Brothers in the early 1900's, who also built the first airplane
The Wright brothers built the first airplane in Ohio but made the first flight in North Carolina.
Glenn Curtiss built the first aircraft for the US Navy in 1910.
The Wright brothers
The Wright brothers made the first ever airplane December 17th 1903.
George Cayley built the first glider, Clement Ader built the first self powered airplane, and Wilbur & Orville Wright built the first self powered and controllable airplane.
Their first fully practical airplane was built in 1905. (Their first powered, sustained and controlled airplane was built in 1903.)
The Wright brother built the first functional airplane and flew it in Kitty Hawk, NC.
The Wright Brothers in the early 1900's, who also built the first airplane
Clyde Cessna built his first Cessna in 1911
paper stuff
the life of the teenager
The Wright brothers
The blimp was invented before the airplane. In 1852 Henri Giffard successfully built the first powered airship and in 1903 The Wright brothers successfully built the first powered airplane.
The Wright brothers built the first airplane in Ohio but made the first flight in North Carolina.
Glenn Curtiss built the first aircraft for the US Navy in 1910.
Wright brothers in 1903.