There are for sure more than the big five nations. I never watched a single episode of naruto but I will try to provide a answer here. You only ask for the nations but I will add a list of the villages too.

![Map][1]

<sub>This [map is made by xShadowRebirthx][2]. **This is not a official map and also some places could be differ from the original!** Rightclick on the Image and press on show image to enlarge the map.</sub>

The countries in Naruto operate as separate political entities and are presumably all monarchies, ruled by feudal lords who stand equally in rank with the hidden villages' leaders.

## The great five countries ##

Five of the countries are considered to be the most powerful and infuential of them all.

 - Land of Earth

![Earth][3]

> The country is mostly comprised of desolate, rocky areas. The border
> of the Land of Earth runs along a rocky mountain range, blocking
> communication with other countries. The wind blowing from the north
> passes over these mountains, carrying small rocks from the Land of
> Earth to the surrounding countries.

 - Land of Fire

![Fire][4]

> The Land of Fire is appropriately oriented towards the element of
> fire, typically having very bright and warm weather. While not the
> physically largest country, it has the largest hidden village.

 - Land of Lightning

![Lightning][5]

> In the centre of the country are vast mountain ranges, whose many
> thunderstorms are said to give the country its name. From these
> mountain ranges, many rivers flow to the sea, creating a very crooked
> coastline that displays an impressive oceanic beauty. There are many
> hot springs located within the country.

 - Land of Water

![Water][6]

> The country's weather is typically cool and the islands are usually
> covered by mist. The islands themselves also feature many lakes. The
> nation is oriented towards the element of water.

 - Land of Wind

![Wind][7]

> The country covers a vast realm, but that realm is largely composed of
> deserts. Because there is very little rainfall throughout the year,
> the people of the country live in villages built on one of the
> desert's many oases. Despite the country's extremely harsh
> environment, it has a large population.

So there are all countries listed, here are four more

 - Land of Iron
 - Land of Snow
 - Land of Sound
 - Land of Sky

## Minor countries ##

Benisu Island, Bean Jam, Bears, Birds, Claws, Demons, Fangs, Forests, Honey, Hot Water, Keys, Mountains, Neck, Noodles, Rivers, Sand, Stone, Swamps, Tea, That, This, Valleys, Vegetables, Whirlpools, Woods, Moon, Sea, Rōran

## Shinobi Villages/Hidden Villages ##

Shinobi villages or also called hidden villages are ninja villages that serve as the military force for their country.

![Hidden Villages][8]

<sub>Most of the informations are from the [Narutopedia][9]. Other information from the frozen site [narutoarikiri][10]. A cached version is avable [here][11].</sub>


  [1]: https://i.sstatic.net/VPF6k.jpg
  [2]: http://www.deviantart.com/#/art/Elemental-Nations-Geographical-Map-317422439?hf=1
  [3]: https://i.sstatic.net/h857w.png
  [4]: https://i.sstatic.net/cBtI8.png
  [5]: https://i.sstatic.net/UZBI0.png
  [6]: https://i.sstatic.net/JyxEM.png
  [7]: https://i.sstatic.net/CQ8fk.png
  [8]: https://i.sstatic.net/frVaB.png
  [9]: http://naruto.wikia.com/wiki/Geography
  [10]: http://narutoraikiri.webs.com/narutocountries.htm
  [11]: http://web.archive.org/web/20130710000331/http://narutoraikiri.webs.com/narutocountries.htm