Condensation polymers are polymers formed through a condensation reaction, where molecules join together, losing small molecules as by-products such as water or methanol.

Bakelite is a condensation polymer of phenol and formaldehyde

Melamine formaldehyde resin is a condensation polymer of melamine (2, 4, 6-triamino-1, 3, 5-triazine) and formaldehyde.