| Vadiyakkadu | |
| Native Name: | Vadiyakkadu |
| Native Name Lang: | Tamil |
| Other Name: | Vadiyakkadu |
| Pushpin Label Position: | right |
| Pushpin Map Caption: | Location in Tamil Nadu, India |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Name1: | Tamil Nadu |
| Subdivision Type2: | District |
| Subdivision Name2: | Thanjavur |
| Subdivision Type3: | Taluk |
| Subdivision Name3: | Pattukkottai |
| Leader Title: | Panchayat President |
| Leader Name: | P.Vivek |
| Unit Pref: | Metric |
| Population Total: | 1147 |
| Population As Of: | 2001 |
| Population Density Km2: | auto |
| Demographics Type1: | Languages |
| Demographics1 Title1: | Official |
| Demographics1 Info1: | Tamil |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Postal Code: | 614903 |
| Area Code: | +91 4373 |
| Registration Plate: | TN49 |
Vadiyakkadu is a village in the Madukkur Panchayat Union, Pattukkottai taluk of Thanjavur district, Tamil Nadu, India, also known as Vadiyakkadu. It is a small and well developing Village located in southern part of Tamil Nadu. It is 15 km from Pattukkottai. It is surrounded with number of villages. Being in the Cauvery River Delta Area the inhabitants’ main occupation is agriculture. Tamil is the official language and is predominantly spoken.
As per the 2001 census, Vadiyakkadu had a total population of 1147 with 580 males and 567 females. The sex ratio was 978. The literacy rate was 71.1.
Thanjavur is known as the "Rice bowl of Tamil Nadu". Paddy is the crops and the other crops grown are blackgram, banana, coconut, gingelly, ragi, red gram, green gram, sugarcane and maize. The total percentage of land fit for cultivation is 58%. There are three seasons for agriculture in Thanjavur - Kuruvai (June to September), Samba (August to January) and Thaladi (September, October to February, March) but due to lack of water resources maximum area should be planted by coconut trees. Paddy and coconut are the major crops cultivated by Vadiyakkadu people.
There is One Government Primary School located in south street.
There are five major temples – Vinayagar Temple, Marriyamman Temple, Sivan Kovil, Ayyanar Temple,MUNISHWARAR TEMPLE, VEERANAR TEMPLE,
Political:
Member of Legislative Assembly N.R. Rangarajan (IN Congress)- MLA of Pattukottai.Councillor - M. Sekar (AIADMK, Keelakurichi)
Vadiyakkadu is a part of the Thanjavur Lok Sabha constituencyMost of the peoples are supporters of AIADMK, DMK and INC Congress.