Hainanese or Hainamese (Hainan Romanised: Hái-nâm-oe, Hainanese Pinyin: Hhai3 nam2 ue1, simplified Chinese: 海南话; traditional Chinese: 海南話; pinyin: Hǎinánhuà), also known as Kengbun/Kengvun (simplified Chinese: 琼文话; traditional Chinese: 瓊文話), Keng language (琼语; 瓊語) or Hainam Min (海南闽语; 海南閩語) is a language of Min Chinese spoken in the island of Hainan and regional overseas Chinese communities in Thailand especially.

In the classification by Yuan Jiahua, it was added to the Southern Min group by Him despite being mutually unintelligible with Southern Min varieties such as Hokkien and Teochew. In the classification of Li Rong, used by the Language Atlas of China, it was treated as a separate Min subgroup. Hou Jingyi combined it with Leizhou Min, spoken on the Leizhou Peninsula, in a Qiong–Lei group. "Hainanese" is also used for the language of the Li people living in Hainan, but generally refers to Min varieties spoken in Hainan.

The phonologies of the different varieties of Hainanese are highly divergent, with the Wenchang dialect being the prestige dialect, and often used as a reference.

Below is a table for the consonants of Hainanese across the dialects of Wenchang, Haikou and the dialect of Banqiao Town, in Dongfang. For more information on a specific variety, please consult the relevant article.

Many of the most widely spoken varieties of Hainanese notably have a series of implosive consonants, /ɓ/ and /ɗ/, which were acquired through contact with surrounding languages, probably Hlai. However, more conservative varieties of Hainanese such as Banqiao remain closer to Leizhou Peninsula Min and other varieties, lack them.

The consonant system of Hainanese corresponds well with that of Leizhou Peninsula Min, but it has had some restructuring. In particular:

Additionally, [ʑ] is an allophone of /j/.

These changes also make Hainanese fairly close to Sino-Vietnamese vocabulary.