Bruijn may refer to;
- Antonie Augustus Bruijn - a Dutch trader in naturalia and naturalist (1842-1890)
- Chantal de Bruijn - a Dutch field hockey player
- Cornelis de Bruijn (1652-1727) - a Dutch artist and traveler
- Inge de Bruijn - a Dutch swimmer
- Nicolaas Govert de Bruijn - a Dutch mathematician
- Pi de Bruijn - a Dutch architect
- De Bruijn graph - Graph theory