Wiegmann is the surname of:

• Arend Friedrich August Wiegmann (1802–1841), a German zoologist
• Arend Joachim Friedrich Wiegmann (1770–1853), a German pharmacist and botanist
• Bettina Wiegmann (born 1971), a German athlete
• Carl Arend Friedrich Wiegmann (1836–1901), a German malacologist
• Casey Wiegmann (born 1973), an American football player
• Norman Arthur Wiegmann (1920–2001), an American mathematician and university professor
• Paul Wiegmann (born 1952), a Russian-American physicist and university professor

• 4-amino-4-deoxy-L-arabinose lipid A transferase
• 4-amino-5-aminomethyl-2-methylpyrimidine aminohydrolase
• 4-Amino-5-hexenoic acid
• 4-Amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-one
• 4-Aminoaniline
• 4-Aminobenzenesulfonamide
• 4-aminobutanoate:pyruvate aminotransferase
• 4-aminobutyrate aminotransferase (disambiguation)
• 4-aminobutyrate---pyruvate transaminase
• 4-aminobutyrate—pyruvate transaminase
• 4-aminobutyric acid aminotransferase
• 4-aminodiphenyl
• 4-Aminohexenoic acid
• 4'-Aminopropiophenone
• 4-aminosalicylic acid
• 4 AM (Melanie Fiona song)
• 4 a.m. (novel)
• 4A Molecular Sieve
• 4 AM (Scooter song)
• 4 And
• 4-Androstadienol
• 4 Artillery Regiment (South Africa)
• 4A scenic area
• 4-Asma Kesme
• 4 ASOS