Mâncio Lima (Portuguese pronunciation: [ˈmɐ̃sju ˈʎimɐ]) is the westernmost municipality of Brazil and it is located in the state of Acre. It is also the northernmost city of that state. Its population is 19,311 and its area is 4,672 km. Its counterparts in the North, South and East are respectively Uiramutã, state of Roraima; Chuí, Rio Grande do Sul; and João Pessoa, the state capital of Paraíba.

The municipality contains 32% of the 846,633 hectares (2,092,080 acres) Serra do Divisor National Park, created in 1989.

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