Protestant ratefalls in city
According to Census 2011 the proportion of Catholics in the city remained static at 75 per cent during the same time-frame. And the amount of people saying they had no religion per cent rose from one to two per cent of the population.
Since 2001 the population of the city has risen modestly - from 105,066 to just 107877.
In terms of national identity Londonderry had one of the lowest rates of people identifying as British-only. The lowest rates were in Newry and Mourne (17 per cent), Londonderry (20 per cent) and Omagh (25 per cent).
Conversely, the city had the highest proportion of people in identifying as Irish-only (52 per cent).
Interestingly, people living in neighbouring Strabane (27 per cent) were amongst the most likely to have a Northern Irish-only national identity.
Focusing on language fourteen per cent of people in Londonderry said they had some grasp of the Irish language; 4.5 per cent said they had some grasp of Ulster-Scots.
Elsewhere, Census 2011 reveals the North West generally suffered a significant decrease in the proportion of children in the population at large.
In fact, the largest proportionate reductions were in predominantly urban areas - Londonderry (14 per cent), Belfast (13 per cent) and Castlereagh (11 per cent) - but there were also sizeable decreases in Limavady (13 per cent) and Strabane (11 per cent).
But Londonderry still has one of the lowest proportions of people aged over 65 with 12 per cent alongside Dungannon, Magherafelt and Newry and Mourne.
Alarmingly, though not surprisingly, the North West had the highest proportion of sick people in NI.
Strabane (49 per cent) had the highest prevalence rate for households containing someone with a long-term health problem or disability, followed by Cookstown, Londonderry and Omagh (all 45 per cent). The lowest prevalence rates were in North Down (34 per cent) and Antrim (36 per cent).
The North West also, not surprisingly, had the highest proportion of unemployed people.
In Londonderry 11 per cent of households contained dependent children and no adults in employment.
In Strabane it was 8.7 per cent and in Limavady it was 8.2 per cent. The lowest proportions were Castlereagh (2.9 per cent) and North Down (3.1 per cent).
The employment rates for lone parents aged 16 to 74 years, living in households with dependent children, were also highest in North Down (66 per cent), Castlereagh (65 per cent) and Newtownabbey while those least likely to be in employment were living in Strabane (40 per cent), Londonderry (43 per cent) or Limavady (44 per cent).
The highest rates for those who had never worked among the unemployed were Londonderry (23 per cent), Belfast (21 per cent) and Strabane (21 per cent).
Londonderry also had a high rate of houses and flats being adapted for sick or disabled people.
The highest rates for adaptations for physical or mobility difficulties other than those requiring wheelchair use were in Belfast (8.4 per cent), Cookstown (7.7 per cent) and Londonderry (7.5 per cent).
Londonderry also had one of the lowest proportions of employed people travelling to work by car or van. Fifty-four per cent of workers in the city said they used a private vehicle to get to work.
The prevalence rates were lower, however, when travel to a place of study is factored in. The lowest rates were in Belfast (29 per cent) and Londonderry (34 per cent).