In Jain tradition, Uttar Pradesh is considered a very pavitra Jin‑kalyāṇak bhūmi. Different granths give slightly different count, but broadly:

• Overall, Digambar tirth–nirdeshikās count about 17 kalyāṇak kṣetra in U.P. ( tirthnirdeshika.com)

Below are the main / well‑known kalyāṇak bhūmis in Uttar Pradesh:

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1. Ayodhyā (Ayodhya)

Very important for both Digambar and Shvetāmbara:

• Janma‑kalyāṇak bhūmi of:

- Ādināth (Rushabhdev) Bhagwān - Ajitnāth Bhagwān - Abhinandan Swāmī - Sumatināth Bhagwān - Anantnāth Bhagwān ( en.wikipedia.org)

• Ayodhya is described as a place where many (18–19) kalyāṇaks of different Tirthankars took place. ( ayodhya.nic.in)

More on Ayodhyā Tirth: You can read more here

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2. Kāśī / Vārāṇasī (Kashi / Varanasi)

• Janma‑kalyāṇak bhūmi of:

- Pārshvanāth Bhagwān - Suparshvanāth Bhagwān - Chandraprabhu Swāmī - Shreyansnāth Bhagwān ( en.wikipedia.org)

Main Jain kalyāṇak sthals around Kashi:

• Bhelupur (Varanasi) – place of four kalyāṇaks of Pārshvanāth (Chyavan, Janma, Dikshā, Keval‑jñān) according to many traditions. ( in.worldorgs.com)
• Bhadaini / Jain Ghat – connected specially with Suparshvanāth Bhagwān (kalyāṇak sthān). ( yappe.in)
• Chandrawati – commemorates three kalyāṇaks of Chandraprabhu Swāmī. ( en.wikipedia.org)
• Singhpuri / Sarnath area (Varanasi) – related to Shreyansnāth Bhagwān – 4 kalyāṇaks (Chyavan, Janm, Dikshā, Keval‑jñān). ( en.wikipedia.org)

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3. Kaushāmbī

• Kaushāmbī Jain Tirth is revered as the Chyavan, Janma, Dikshā and Moksha kalyāṇak bhūmi of Padmaprabhu Swāmī (6th Tirthankar) in many Shvetāmbara and Digambar traditions. ( jaintirth.in)

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4. Singhpur / Sārnāth (near Vārāṇasī)

Sometimes listed separately from “Varanasi city”:

• Singhpuri / Sarnath Jain Tirth – four kalyāṇaks of Shreyansnāth Bhagwān:

Chyavan, Janm, Dikshā and Keval‑jñān. ( en.wikipedia.org)

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5. Ahichchhatra (Bareilly district)

• Important Digambar Kalyāṇak Kshetra.
• Temples here are built to commemorate Parshvanāth Bhagwān attaining Keval‑jñān kalyāṇak at this place. ( en.wikipedia.org)

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6. Hastināpur (Meerut district)

• A very major Jain tirth; many granths connect it with:

- Life‑events (vihar, samavasaran, etc.) of Shāntināth, Kunthunāth, Aranāth and other Tirthankars. ( en.wikipedia.org)

• Though nirvāṇa of these Tirthankars is at Sammed Shikhar, Hastināpur is still counted among important Jin‑kalyāṇak sthals and is included in tirth‑mālās for U.P.

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7. Other important Jin‑kalyāṇak kṣetras in U.P.

Different Digambar / Shvetāmbara tirth‑lists also include, for various kalyāṇaks (mainly Janma, Dikshā or Keval‑jñān):

• Shrāvastī (Shravasti)
• Kampilpur (Kampilji)
• Ratnapur / Ratnapuri (near Ayodhya)
• Mathurā – Kankāli Ṭilā area, old Jain sthals ( en.wikipedia.org)

Exact mapping (which Tirthankar – which specific kalyāṇak) differs a little between old Digambar and Shvetāmbara granths, and the full list is quite long (around 67 Jin‑kalyāṇak tirths said to lie in U.P. as per some modern summaries). ( rajsaubhag.org)

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Summary (simple):

• Uttar Pradesh is called a Jin‑kalyāṇak bhūmi because many Tirthankars’ main life‑events (especially birth – janma kalyāṇak) happened here.
• The most important kalyāṇak places you should remember are:

Ayodhyā, Kāśī/Varanasi (Bhelupur, Bhadaini, Chandrawati, Singhpuri), Kaushāmbī, Ahichchhatra and Hastināpur, plus other sthals like Shravasti, Kampilpur, Ratnapuri, Mathura etc.

If you want a detailed, tirth‑by‑tirth list (with all 67+ spots), it is usually taken from traditional tirth‑mālā books used in Jain libraries and yatras; your local Jain pustak‑bhandār will have them.