For MySQL 5.0.3 and higher, you can use BIT. The manual says:
As of MySQL 5.0.3, the BIT data type is used to store bit-field values. A type of BIT(M) enables storage of M-bit values. M can range from 1 to 64.
Otherwise, according to the MySQL manual you can use bool and boolean which are at the moment aliases of tinyint(1):
Bool, Boolean: These types are synonyms for TINYINT(1). A value of zero is considered false. Non-zero values are considered true.
MySQL also states that:
We intend to implement full boolean type handling, in accordance with standard SQL, in a future MySQL release.
References: http://dev.mysql.com/doc/refman/5.5/en/numeric-type-overview.html
BTW: this is just a matter of https://google.com/search?q=mysql+boolean+datatype.

For MySQL 5.0.3 and higher, you can use `BIT`. The manual says:
> As of MySQL 5.0.3, the BIT data type is used to store bit-field > values. A type of BIT(M) enables storage of M-bit values. M can range > from 1 to 64.

Otherwise, according to the MySQL manual you can use bool and boolean which are at the moment aliases of [tinyint][1](1):
> Bool, Boolean: These types are synonyms for [TINYINT][1](1). A value of > zero is considered false. Non-zero > values are considered true.
MySQL also states that:
> We intend to implement full boolean > type handling, in accordance with > standard SQL, in a future MySQL > release.
References: http://dev.mysql.com/doc/refman/5.5/en/numeric-type-overview.html
BTW: this is just a matter of [https://google.com/search?q=mysql+boolean+datatype][2].
*Funny isn't it, this link, posted a few years back, has become recursive.*

[1]: http://dev.mysql.com/doc/refman/5.7/en/integer-types.html [2]: https://google.com/search?q=mysql+boolean+datatype