Dragons Of The World

On December 22, 1945 Spain issued a three-value set of semi-postal charity stamps to benefit anti-tuberculosis relief. Saint George and the dragon are depicted on the stamps. Shown here is the 20c + 5c low value (Sc #B134) from the set.

Shanghai Local Post Office - I was surprised to not see any examples of the first issue shown on this thread.

The earliest description of the large dragon stamps appeared in The London and China Telegraph
of October 10, 1865. Printed in London, with Shanghai dates to August 16, 1865 it mentions:

The new local postage stamps are great curios, and should be bought up in quantity to
send home for the illumination of postage stamp albums. There are four kinds, viz. two
candareens in black - four candareens in yellow - eight in green - and sixteen in red. The
size, the superfices, as compared with a Hong Kong stamp, is as 528 to 270 - that is to
say, they are almost as large again, and exhibit the following expression. In the centre a
device intended to represent a dragon, though unmistakable as as a caterpillar
glowworm. On the top, in English, Shanghai L.P.O. , and the Chinese characters for
Shanghai. On the bottom the value, say 16 candareens, and the Chinese characters for
Kungpoo, and the local designation of the municipal council. On the dexter side the value
in Chinese characters, as one mace and six fun, and on the sinister side, Shuisinkwan,
Post-office. In use, both scissors and paste are required, the one to clip, the other to effect
adhesion. As we say, the local post stamps are curious, figuratives of the time.

(background add-on:In 1863 the multinational Shanghai Municipal Council opened a subscription-based post office to collect and distribute mails between the foreign settlement in Shanghai and Hong Kong and to deliver local Shanghai letters for both the resident foreign and Chinese populations. The Shanghai Local Post Office soon became one the most important communications hubs in nineteenth-century China. So, it was not a "local post" by any standard definition.

Here is an example from Printing #1: (is this the first stamp issued to portray a dragon?)

Antigua

1980

Christmas, Disney - 9v

Sleeping Beauty

The Maleficent, turned in a dragon, confronts Phillip, that use the blessed sword to kill her

Singapore
Year of the Dragon
January 1, 2000
The stamp in the minisheet features a stylized golden dragon.

Here is the 1st class local (26c) Chinese New Year stamp from Singapore's February 29, 2008 set of 4, self-adhesive "Festivals" stamps.

Peru
160 Years of Chinese Immigration to Peru
October 12, 2009
The stamp depicts a paifang gate with a pair of dragons.

On March 23, 1988 Hong Kong issued this "Year of the Dragon" computer-vended stamp. At the time of issue, Hong Kong's two Frama FE264 vending machines were capable of dispensing four values: .10, .50, 1.30, and 1.70. The "02" in the upper left corner indicates that this stamp was sold from machine #2.

On December 15, 1945 the city of Plauen in the Vogtland area of Soviet zone of occupied Germany issued a seven-stamp set of "Reconstruction" semi-postal stamps. The 12 + 8 pf value (Mi #8) of this set shows an illustration of a "George the Dragon Slayer Monument".

Thailand
Japan-Thailand Diplomatic Relations
September 26, 2007
Set of eight, one stamp shows an embroidery dragon.

Here is the 2 drachma value (Sc #796) from Greece's July 20, 1964 set of 7 stamps commemorating the centenary of the incorporation of the Ionian Islands into the nation. Each value shows a symbol representing an island, and this stamp shows St. George slaying the dragon, representing Lefkas Island.

Republic of Korea
Definitive Issue
August 1, 2018
The stamp features a Joseon Dynasty porcelain jar with Dragon and Cloud design.

This February 24, 1998 26 p stamp (SG #2029) of Great is from the se-tenant strip of five issued to commemorate the 650th anniversary of the Order of the Garter. All five stamps show very similar designs of pairs of coats of arms and "The Queen's Beasts". The Welsh dragon is depicted on this stamp.

On May 5, 1946 Czechoslovakia issued a set of two semi-postal stamps of identical design depicting St. George slaying the dragon. The 2.40 + 2.60 koruna value of the set is shown here.

An imperforate souvenir sheet of the same design, printed in black and issued on the same day is shown on page 4 of this thread.

This December 16, 1963 5 yen stamp (Sc #805) of Japan commemorates the upcoming (1964) Year of the Dragon.

Germany
Legends of Germany
October 7, 2021
Set of two, one stamp entitled Die Nibelungen shows a scene of Siegfried fighting the dragon.