# Population (1 January) — Agglomeratie Leiden en Bollenstreek (NUTS 2021) (NUTS-3 NL337)

Population (1 January) — Agglomeratie Leiden en Bollenstreek (NUTS 2021) (NUTS-3 NL337) was 440,312 persons in 2023, up 1.3% from 2022.
That is the highest reading since the series began in 2003.
Over the past ten years it has ranged from 411,351 persons (2013) to 440,312 persons (2023), averaging 424,322 persons.

- Source agency: Eurostat (Statistical Office of the European Union)
- Makrognosis code: `NL-337.POP.A.NSA`
- Frequency: annual
- Units: persons
- Coverage: 2003-01-01 to 2023-01-01 (21 observations)
- Page: https://makrognosis.robomacro.com/data/netherlands/population-1-january-agglomeratie-leiden-en-bollenstreek-nuts-2021-nuts

## Recent data

| Period | Value |
|---|---:|
| 2023 | 440,312 persons |
| 2022 | 434,527 persons |
| 2021 | 431,595 persons |
| 2020 | 430,358 persons |
| 2019 | 427,217 persons |
| 2018 | 424,657 persons |
| 2017 | 421,296 persons |
| 2016 | 418,023 persons |
| 2015 | 415,106 persons |
| 2014 | 413,101 persons |
| 2013 | 411,351 persons |
| 2012 | 409,129 persons |
| 2011 | 407,237 persons |
| 2010 | 404,736 persons |
| 2009 | 402,770 persons |
| 2008 | 401,309 persons |
| 2007 | 400,377 persons |
| 2006 | 400,295 persons |
| 2005 | 399,950 persons |
| 2004 | 399,643 persons |
| 2003 | 398,416 persons |

## API

```
curl -H "X-API-Key: $MAKROGNOSIS_KEY" \
  "https://makrognosis.robomacro.com/v1/series/NL-337.POP.A.NSA"

# Python
import requests
r = requests.get("https://makrognosis.robomacro.com/v1/series/NL-337.POP.A.NSA",
                 headers={"X-API-Key": KEY})
obs = r.json()["observations"]
```