http://en.wikipedia.org/wiki/Mecklenburg-Vorpommern

Obersachsen, Sachsen

http://en.wikipedia.org/wiki/Saxony 

This translates as Saxony, or Upper Saxony, and is found in the southeast corner of the present borders of Germany. Many of the folk costumes of this State are Sorbian. Here is an Upper Saxon costume from around Dresden.

Sachsen-Anhalt 

http://en.wikipedia.org/wiki/Saxony-Anhalt 

This translates as Saxony-Anhalt, and lies between the states of Saxony [Upper Saxony], and Lower Saxony.

This group is from Salzwedel in the north.

http://en.wikipedia.org/wiki/Lower_Saxony 

Lower Saxony, this lies in the northwest corner of Germany. It is today divided into four Bezirke, Lueneburg, Hanover, Braunschweig, and Weser-Ems.

Lüneburg

Here is one extremely well maintained costume of this area, from Scheessel.

 Hanover 

One of the most famous and spectacular costumes of this area is that of Buekeburg in Schaumburg.

Bremen

http://en.wikipedia.org/wiki/Bremen 

The famous city of Bremen forms its own City-State in two non contiguous districts, Bremen and Bremen-Port.

 Thüringen

http://en.wikipedia.org/wiki/Thuringia 

Thuringia, This borders all three Saxonys on the south, with Hesse in the west, and Bavaria in the south.It

http://en.wikipedia.org/wiki/Hesse 

This is the home of the Hessians. It lies in central Germany The three Bezirke divide Hesse into northern, central and southern regions.

North Hesse

This costume is from the Schwalm, which is the location of the famous German Fairy Tale Rotkäppchen, which literally means 'Little Red Cap', which you can see in the photo. For some strange reason, this is usually translated into English as 'Little Red Riding Hood'. In fact, she did not wear a hood, but a little red cap like this.

Central Hesse

 This costume is from Marburg.

South Hesse

 This couple is from Odenwald.

Nordrhein-Westfalen 

 http://en.wikipedia.org/wiki/North_Rhine-Westphalia

 This state combines the historic region of Westphalia in the north with the northern part of the Rhineland in the south.

Westphalia 

This costume is from  near Münster 

Nordrhein

 This is the most populous part of Germany, and there is little that is remembered of Folk Costume.This group is from Elsdorf.

Rheinland-Pfalz

Baden-Württemberg

http://en.wikipedia.org/wiki/Baden-W%C3%BCrttemberg 

 This lies in the southwest corner of Germany and consists of the historic regions of Baden and Wuerttemberg, or Schwabia.Baden is a relatively narrow region on the west of this area, and Wuerttemberg comprises the eastern two thirds.

Lower Baden

This costume is from the area known as Hanauerland. The similarities to the costume of the neighboring region of Alsace are obvious.

  Upper Baden

This group is from the village of Furtwangen in the Black Forest.

North or LowerWürttemberg

This is the Betzingen costume.

  South or Upper Württemberg

This costume is from the region of WestAllgäu, near the Bodensee. It has much in common with Austrian and Swiss costumes just over the border, including the famous radhaube [wheel headdress].

 Bayern

 http://en.wikipedia.org/wiki/Bavaria

Bavaria, in the south of Germany, the largest State. It consists of Upper Bavaria, Lower Bavaria, The eastern part of Schwabia, and Franconia.

Schwaben

This costume is from Oberstdorf in Bavarian Swabia. 

Mittelfranken

This costume is from Schwabach.

Unterfranken

This costume is from Ochsenfurt in Lower Franconia.

Oberfranken 

This costume is from Effeltrich in Upper Franconia.

 Oberpfaltz

Sometimes translated as The Upper Palatinate, this is in the east of the State of Bavaria between Bavaria proper and Franconia.This costume is from Parsberg.

Niederbayern 

This costume is from the Vils valley in Lower Bavaria.