兰卡（Lanka），是印度阿萨姆邦Nagaon县的一个城镇。总人口34386（2001年）。

该地2001年总人口34386人，其中男性17841人，女性16545人；0—6岁人口4382人，其中男2246人，女2136人；识字率73.10%，其中男性为77.78%，女性为68.05%。

Lanka /ˈləŋkɑː/ (Sanskrit lankā "island") is the name given in Hindu mythology to the island fortress capital of the legendary demon king Ravana in the epics of the Ramayana and the Mahabharata. The fortress was situated on a plateau between three mountain peaks known as the Trikuta Mountains. The ancient city of Lankapura is thought to have been burnt down by Hanuman. After its king, Ravana, was killed by Rama with the help of his brother Vibhishana, the latter was crowned king of Lankapura. The mythological site of Lankā is identified with Sri Lanka. His descendants were said to still rule the kingdom during the period of the Pandavas. According to the Mahabharata, the Pandava Sahadeva visited this kingdom during his southern military campaign for the rajasuya of Yudhishthira.