Rotherham by-election may refer to:

• Rotherham by-election, 1899
• Rotherham by-election, 1910
• Rotherham by-election, 1917
• Rotherham by-election, 1976
• Rotherham by-election, 1994
• Rotherham by-election, 2012
• The Rotherham by-elections of 1892, 1916, or 1933 - see Rotherham (UK Parliament constituency)

• Nematozoa
• Nemat Talaat Shafik
• Ne'matullah Haidari
• Nematullah Naseri
• Nematus
• Nematus leucotrochus
• Nematus oligospilus
• Nematus spiraeae
• Nematus tibialis
• Nematus ventralis
• Nemaura Medical
• Nema (urban-type settlement)
• Ne Mbanda-Mbanda
• Ne mbanda-mbanda
• Nembe Creek Trunk Line
• Nembe people
• Nembou
• Nembrothinae
• Nem-catacoa
• Nemcatacoa
• Nemcha Kipgen
• Nemchinov
• Nem chua ran
• Nemcicky
• NEM (coin)