Thap Lan Ulusal Parkı (Tayca: อุทยานแห่งชาติทับลาน, RTGS: Utthayan Haeng Chat Thap Lan, Tayca telaffuz: [ʔùt.tʰā.jāːn hɛ̀ŋ t͡ɕʰâːt tʰáp lāːn]), Tayland'dakiPrachinburi, Nakhon Ratchasima illeri arasında yer alan Sankamphaeng Dağları üzerinde yer alan bir millî parktır. 23 Aralık 1981'de milli park olarak kurulan park, ülkenin 40. milli parkıydı.[2] İlgi çekici yerleri arasında Lan Ormanı ve Dinlenme Bahçesi (ป่าลานและสวนพักผ่อนหย่อนใจ); Namtok Thap Lan (veya Namtok Heo Nok Kok) (น้ำตกทับลานหรือน้ำตกเหวนกกก); Thap Lan Rezervuarı (อ่างเก็บน้ำทับลาน); Namtok Huai Yai (น้ำตกห้วยใหญ่); Lam Mun Bon Barajı (เขื่อนลำมูลบน); Hat Chom Tawan (หาดชมตะวัน) bulunmaktadır.[3]