The difference between Allocate and Apportion

When used as verbs, allocate means to set aside for a purpose, whereas apportion means to divide and distribute portions of a whole.

check bellow for the other definitions of Allocate and Apportion

Allocate as a verb:

To set aside for a purpose.
Allocate as a verb:

To distribute according to a plan, generally followed by the adposition .

Examples:

"The bulk of K–12 education funds are allocated to school districts that in turn pay for the cost of operating schools."
Allocate as a verb (computing):

To reserve a portion of memory for use by a computer program.

Apportion as a verb (transitive):

To divide and distribute portions of a whole.

Examples:

"The controlling party had apportioned the voting districts such that their party would be favored in the next election."
Apportion as a verb (transitive):

Specifically, to do so in a fair and equitable manner; to allocate proportionally.

Examples:

"The children were required to dump all of their Halloween candy on the table so that their parents could apportion it among them."