Thandalai

{{Use dmy dates|date=April 2018}}

{{Use Indian English|date=April 2018}}

{{Infobox settlement

| name = Thandalai

| native_name =

| native_name_lang =

| other_name =

| nickname =

| settlement_type = village

| image_skyline =

| image_alt =

| image_caption =

| pushpin_map =

| pushpin_label_position = right

| pushpin_map_alt =

| pushpin_map_caption = Location in Tamil Nadu, India

| coordinates =

| subdivision_type = Country

| subdivision_name = {{flag|India}}

| subdivision_type1 = State

| subdivision_name1 = Tamil Nadu

| subdivision_type2 = District

| subdivision_name2 = Ariyalur

| established_title =

| established_date =

| founder =

| named_for =

| government_type =

| governing_body =

| unit_pref = Metric

| area_footnotes =

| area_rank =

| area_total_km2 =

| elevation_footnotes =

| elevation_m =

| population_total = 5310

| population_as_of = 2001

| population_rank =

| population_density_km2 = auto

| population_demonym =

| population_footnotes =

| demographics_type1 = Languages

| demographics1_title1 = Official

| demographics1_info1 = Tamil

| timezone1 = IST

| utc_offset1 = +5:30

| postal_code_type = PIN

| postal_code = 621803

| area_code_type = Telephone code

| area_code = 04331

| registration_plate =TN-

| blank1_name_sec1 = Coastline

| blank1_info_sec1 = {{Convert|0|km|mi}}

| blank2_name_sec1 = Nearest city

| blank2_info_sec1 = Trichy

| blank3_name_sec1 = Sex ratio

| blank3_info_sec1 = 1.054 ♂/♀

| blank4_name_sec1 = Literacy

| blank4_info_sec1 = 62.07%

| website =

| footnotes =

}}

Thandalai is a village in the Udayarpalayam taluk of Ariyalur district, Tamil Nadu, India.

Government higher secondary school is located in Thandalai village.