Isiolo South Constituency

{{Infobox settlement

| official_name = Isiolo South Constituency

| settlement_type = Constituency

| image_skyline =

| image_caption =

| image_flag =

| flag_size =

| image_shield =

| shield_size =

| image_map = Isiolo-Isiolo South.svg

| map_caption = Location of Isiolo South Constituency in Isiolo County

| coordinates =

| subdivision_type =

| subdivision_name =

| established_title =

| established_date =

| seat_type =

| seat =

| seat1_type =

| seat1 =

| parts_type =

| parts_style =

| p1 =

| leader_title =

| leader_name =

| area_total_km2 = 9,817

| area_land_km2 =

| area_water_km2 =

| elevation_m =

| population_footnotes = {{cite web |title=Delimitation of Constituencies and Recommendations on Local Authority Electoral Units and Administrative Boundaries for Districts and Other Units |url=https://www.iebc.or.ke/uploads/resources/oep20PEuYn.pdf |website=Independent Electoral and Boundaries Commission (IEBC) |access-date=13 May 2019}}

| population_total = 43,118

| population_as_of = 2009

| population_density_km2 = auto

| timezone =

| utc_offset =

| website =

| footnotes =

}}

Isiolo South Constituency is an electoral constituency in Kenya. It is one of two constituencies of Isiolo County. The constituency has nine wards, all electing councillors to the Isiolo County Council. The constituency was established for the 1966 elections.