Husbands And Wives Pictured Together On Postage Stamps

India
Nellie and Jatindra Mohan Sengupta
July 22, 1985
Jatindra Mohan Sengupta (1885–1933) was an Indian lawyer and revolutionary against the British rule. Nellie Sengupta (1886–1973), born Edith Ellen Gray, was an Englishwoman who married Jatindra Mohan and fought for Indian Independence. She was elected president of the Indian National Congress at its 47th annual session at Calcutta in 1933.

Norway
Harald V - 25 Years as King
January 11, 2016
The commemorative stamp depicts the consecration of King Harald and Queen Sonja in June 1991.
(photographer: Bjørn Sigurdsøn)

Spain
75th Birthday of Their Majesties the King and Queen of Spain
November 5, 2013
The commemorative stamp honors King Juan Carlos I (1938 - ) and Queen Sophia (1938 - ). They were married on May 14, 1962 in Athens Cathedral. Juan Carlos reigned as King of Spain from 1975 until his abdication in 2014.

Denmark
Royal Golden Wedding
June 15, 2017
The souvenir sheet commemorates the 50th wedding anniversary of Queen Margrethe II and Henri de Laborde de Monpezat.

Finland
Philanthropists
September 10, 2003
Set of six, one stamp depicts Juho and Maria Lallukka, patron of the arts in the city of Vyborg.

Spouses astronauts Valentina Tereshkova and Andriyan Nikolaev

Here is an image of a stamp featuring portraits of Ethiopian Emperor Haile Selassie I (1892-1975) and Empress consort Menen Asfaw (1891-1962), and depicting a shield and crossed spears, engraved and printed by Bradbury Wilkinson & Co., and issued by Ethiopia on May 5, 1949 as one of a set of five stamps commemorating the 8th anniversary of Ethiopia's Liberation, Scott No. 300, plus a photo of the couple decked out in their imperial regalia.

- nethryk

Would ex-spouses count?

Princess Royal Anne and Cpt. Mark Phillips, both Olympic equestrians (Mark is an Olympic champion)

France
Lucie and Raymond Aubrac
May 26, 2018
The stamp commemorates Raymond Aubrac (1914-2012) and Lucie Aubrac (1912-2007) who were members of the French Resistance during World War II. The couple have been married for 68 years (1939 - 2007).

If fictional characters count, here's one of Mr and Mrs Fezziwig from the Charles Dickens novel A Christmas Carol. Great Britain, SG 1791, issue date 11 November, 1993.

Here's a notorious couple, lengthy tumultuous courtship, stormy ill-fated marriage....
US Scott #2446 from 1990



Now for a real life couple, although here we have royalty again: Ferdinand II of Aragon (1452 – 1516) and Isabella, Queen of Castile (1451 – 1504) shown on US Sc. 238, from the 1893 Columbian issue, sitting on their thrones listening to Columbus announce to them his discoveries.

Franklin (1882–1945) and Eleanor (1884–1962) Roosevelt were depicted of course on a number of stamps separately, but I finally found one of them together in a design repeated on three stamps issued by El Salvador in 1948.

Scott 607 (8 centavos green & black),
Scott c114 (red and black 25 centavos) and
C117 a souvenir sheet (green and black 4 colones)

The red frame of the C114 is sharper looking I think:

In the 1993 American Music Series, there was one that depicted the Carter Family (Sc.2773)
A. P. Carter, his wife Sara Carter, and his sister-in-law Maybelle Carter were pictured. That'd be Maybelle at the left with the guitar in hand. Sara usually played autoharp.