Sanatkumara Swarg (Sanatkumārakalpa) is a Jain cosmological realm.

• What it is

- Sanatkumara Swarg is one of the 16 Devalokas (heavens) in the upper world. It is a kalpa (celestial abode) inhabited by Kalpopapanna gods, the deva-sorts who reside in lofty celestial planes. This is part of the Jain scheme of Devaloka and is treated as a real celestial realm within samsara, not a place of final liberation. ( jainknowledge.com)

• Significance in Jain cosmology

- It is listed among the higher heavens that beings can reach through punya (merit) before the cycle of rebirth continues. In common listings, Sanatkumara is the third heaven in the sequence of the Kalpa heavens, just after Saudharma and Ishana, before Mahendra and others. The Devaloka are real but temporary stages on the path toward moksha. ( jainknowledge.com)

• What the realm represents

- The heavenly realm emphasizes the vast structure of the loka (cosmos) and the transient pleasures of Devaloka. Recitation and contemplation about these planes are meant to cultivate right view and detachment, reminding us that liberation is the ultimate goal beyond all heavens. This is a common thread in Pratikraman and cosmology discussions in Jain tradition. ( jainknowledge.com)

• Do Digambara and Śvetāmbara see it the same?

- Yes, both traditions recognize Sanatkumara as one of the Kalpa-heavens (the Devaloka). The core idea—the existence of 16 Devalokas, with Sanatkumara among them—is shared, though minor lists and ordering can vary in different texts. The practical takeaway for practitioners is the same: heavenly realms are part of samsara, not the path to liberation. ( jainknowledge.com)

• Quick names you may hear together with it

- Other commonly named Kalpa-heavens in the same framework include Saudharma and Ishana (before Sanatkumara in the sequence). Beyond Kalpa-heavens, there are Graiveyak, Anuttar, and finally Siddhashila for liberated souls. The general scheme is widely used in Jain devotional and study contexts. ( jainknowledge.com)

If you’d like, I can point you to a concise JainKnowledge page that lists the 16 Devalokas and where Sanatkumara fits in. You can read more here