It comes after there were more deaths than births for the first time last year, prompting the government to take action.
Figures from 2015 showed that despite women on average wanting two or more children, those aged 18-49 had an average of 1.3, significantly below the EU average of 1.58.
The statistics mean Spain has one of the lowest birth-rates in the developed world.
The new ‘sex tsar’, Edelmira Barreira, will help draft a national strategy to tackle the demographic imbalances.
She has been appointed by Prime Minister Mariano Rajoy.
Spain’s education ministry said the declining birth-rate ‘aggravates other economic imbalances and generates important “impacts” in the Welfare State’.
Rafael Puyol of the Madrid IE Business School said people are too tired after a full day at work and blamed long working hours and late nights.
He said: “They do not help with making a family. Then a child arrives and it is even worse.”
- Little Julen and family pictured amid reports rescuers have found DNA - 16 Jan, 2019 @ 14:38
- Police in Spain rescue young man attempting to jump off Ronda bridge - 16 Jan, 2019 @ 14:15
- Police confirm little Julen IS inside the Malaga well after DNA found on fourth day of search - 16 Jan, 2019 @ 12:59
- ‘He loves his tricycle’: Neighbours describe ‘friendly’ toddler Julen and his family’s history of heartbreak as search for tot in Malaga well continues - 15 Jan, 2019 @ 19:35
- Drilling expert claims it’s ‘almost impossible’ for little Julen to have fallen down Malaga well as builder claims he sealed up hole just WEEKS ago - 15 Jan, 2019 @ 18:15
- HEART-WRENCHING: Parents of trapped boy have slept next to Malaga well since Sunday and are ‘dead inside’ as rescue attempt enters THIRD day - 15 Jan, 2019 @ 14:22
- WATCH: ISIS terrorist cuffed in popular British expat hotspot on Spain’s Costa del Sol was ‘ready to attack’ after taking deadly oath - 15 Jan, 2019 @ 13:15
- British expats in Spain should get Spanish driving licences ASAP, UK government Brexit memo warns - 15 Jan, 2019 @ 11:50
- Fears grow for boy, 2, trapped down Malaga well for over 18 hours as desperate rescue attempt continues - 14 Jan, 2019 @ 14:00
- WATCH: Two fuming drivers stop cars to BRAWL among traffic on Marbella’s Golden Mile - 11 Jan, 2019 @ 17:15