Moiben is a

constituency An electoral district, also known as an election district, legislative district, voting district, constituency, riding, ward, division, or (election) precinct is a subdivision of a larger State (polity), state (a country, administrative region, ...

in Kenya, one of six constituencies in Uasin Gishu County.
Moiben Constituency is divided into the following Wards: # Moiben Ward
# Sergoit Ward
# Kimumu Ward
# Tembelio Ward
# Karuna/Meibeki Ward

References

Constituencies in Uasin Gishu County {{Kenya-geo-stub