Hans-Joachim Hannemann (5 April 1915 – 6 March 1989) was a German rower who competed in the 1936 Summer Olympics.

In 1936 he won the bronze medal as a member of Germany's boat team in the men's eight competition behind Italy, silver, and the USA, gold.

The men's eight competition at the 1936 Summer Olympics took place at Grünau Regatta Course in Berlin, Germany. The event was held from 12 to 14 August, and was won by a United States crew from the University of Washington. This event is chronicled in The Boys in the Boat written by Daniel James Brown. There were 14 boats (126 competitors) from 14 nations, with each nation limited to a single boat in the event. The victory was the fifth consecutive gold medal in the event for the United States and seventh overall; the Americans had won every time they competed (missing 1908 and 1912). Italy repeated as silver medalists. Germany earned its first medal in the men's eight since 1912 with its bronze. Canada's three-Games podium streak ended.

Hans-Joachim’s medals are as follows:

1. bronze table medal “Berliner Regatta-Verein 3.Juni 1934”, a young version of Adolf Hitler on avers. 79.9 mm in diameter.
2. Similar bronze medal on pedestal, “Berliner Regatta-Verein 16.17.Juni 1934”, a young version of Adolf Hitler on avers. 95 mm in diameter.
3. a wooden and bronze plaque on the 1934 Schwerin Rowing Regatta. 14.5 x 9.5 cm.
4. cast bronze medal with crest of the city of Berlin, revers with Brandenburg Gate and swastika, 9 cm. Makers mark on rim.
5. 2 Olympic patches on wool background, finely embroidered and worn during the Games. 10.5 x 9.5 cm, one with tinny moth hole.
6. 1 Olympic patch for a tank top. White wool background with high quality embroidery. 15 cm in diameter.
7. a commemorative pennant on the victorious Olympic Games. Issued by the Berlin Sport Club. 17.5 x 11.5 cm plus tassels.
8. cased Olympic Commemorative medal in case of issue. Here not the official version to wear, but a table medal in gilded silver. 17.5 gram 36.6 mm in diameter.
9. brown biscuit porcelain commemorative plaque for the “Grosse Internationale Ruder-Regatta - 19-20 Juni 1937 - Gruenau. Berliner Regatta-Verein”, made by the famous Meissen Manufacture. 95 mm in diameter.
10. A cased porcelain table medal by the State Porcelain Manufacture in Berlin. 1237-1937 septennial.
11. silver DRL Achievement Badge for 1937, revers marked DRL and “ges.gesch.”, 3.3 gram and 20 mm in diameter.
12. silver DRL Achievement Badge for 1937 in cloth. Machine woven, shirt removed. 7 x 8 cm.
13. Bronze price in form of a NSDAP stander for the Grand International Rowing-Regatta from June 25-26, 1938, dedicated by the Berlin Regatta Society, on marble base. 12 x 7 cm.
14. silver DRL Achievement Badge for 1939, revers marked DRL and “ges.gesch.”, 3.1 gram and 20 mm in diameter.
15. Zinc based plaque for the “1941 - 21./22. Juni - II. Grosse Kriegs-Ruder-Regatta - Berliner Regatta-Verein”, made by Rob.Neff - Berlin W.38
16. A “1944” bar 2.8 gram, 8.3 x 33.3 mm
17. silver DRL Achievement Badge for 1944 in cloth, Machine woven, unissued, 7 x 8 cm.
18. Polish NOC pin with makers mark on revers, 1.5 gram, 20.2 x 15.9 mm.

There are also the following documents:

1. his Sport ID card valid from 1935 to 1936 for the division: rowing
2. Victory documents by the NSRL:
   1. Solo tandem, May 25, 1941
   2. Senior eight, May 25, 1941
   3. Cross country run off the rowers on place 4, December 14, 1941.
   4. Senior four, June 4, 1944
   5. Senior four (heavy), June 24./25, 1944
   6. Solo tandem, June 24./25, 1944
   7. Senior eight, June 24./25, 1944
3. modern foto of the winning Olympic team
4. Modern foto of the Olympic team with set of autographs
5. His ID card allowing him free access to all sport venues within the city of Berlin as winner in the Olympic Games 1936.