* Nucleus: This is the main repository of DNA in eukaryotic cells. It contains the majority of the cell's genetic material, organized into chromosomes.

* Mitochondria: These organelles have their own circular DNA molecule, separate from the nuclear DNA. This mitochondrial DNA (mtDNA) encodes for some of the proteins involved in cellular respiration.

* Chloroplasts (in plants and algae): Like mitochondria, chloroplasts also have their own circular DNA molecule, called chloroplast DNA (cpDNA). This DNA encodes for proteins involved in photosynthesis.

While these are the primary organelles that contain DNA, there are other instances where DNA can be found within a cell, such as in:

* Plasmids: These are small, circular DNA molecules found in some bacteria.

* Viruses: Some viruses contain their genetic material as DNA.

It's important to note that the DNA within organelles like mitochondria and chloroplasts is distinct from the nuclear DNA and has its own unique characteristics and functions.