The LUX-ZEPLIN (LZ) experiment will enable a neutrinoless double
β
decay search in parallel to the main science goal of discovering dark matter particle interactions. We report the expected LZ sensitivity to
136
Xe
neutrinoless double
β
decay, taking advantage of the significant (
>
600
kg)
136
Xe
mass contained within the active volume of LZ without isotopic enrichment. After 1000 live-days, the median exclusion sensitivity to the half-life of
136
Xe
is projected to be
1.06
×
10
26
years (90% confidence level), similar to existing constraints. We also report the expected sensitivity of a possible subsequent dedicated exposure using 90% enrichment with
136
Xe
at
1.06
×
10
27
years.