Ana María Nielsen
| Personal information | |
|---|---|
| Full name | Ana María Nielsen Udrizard |
| Nationality | Argentine |
| Born | 11 April 1951 |
| Sport | |
| Sport | Athletics |
| Event(s) | 800 metres, 1500 metres, marathon |
| Club | Club Atlético Talleres |
| Coached by | Juan Carsolio |
Ana María Nielsen Udrizard (born 11 April 1951) is a retired Argentine middle-distance and marathon runner. She won multiple medals at continental level. She also held several national records.
She is of Danish descent.